Number of the day: 64555

Properties of the number 64555:

64555 = 5 × 12911 is semiprime and squarefree.
64555 has 2 distinct prime factors, 4 divisors, 11 antidivisors and 51640 totatives.
64555 has a semiprime digit sum 25 in base 10.
Reversing the decimal digits of 64555 results in an emirpimes.
64555 = 32278² - 32277² = 6458² - 6453² is the difference of 2 nonnegative squares in 2 ways.
64555 is the difference of 2 positive pentagonal numbers in 2 ways.
64555 = 23² + 45² + 249² is the sum of 3 positive squares.
64555² = 38733² + 51644² is the sum of 2 positive squares in 1 way.
64555² is the sum of 3 positive squares.
64555 is a proper divisor of 431¹²⁹¹ - 1.
64555 = '6' + '4555' is the concatenation of 2 semiprime numbers.
64555 is an emirpimes in (at least) the following bases: 2, 5, 7, 10, 13, 18, 19, 26, 27, 28, 32, 39, 45, 53, 57, 60, 62, 68, 71, 74, 76, 77, 82, 85, 90, 92, 96, and 97.
64555 is palindromic in (at least) the following bases: 52, 61, and -99.
64555 in base 52 = NjN and consists of only the digits 'N' and 'j'.
64555 in base 60 = Htt and consists of only the digits 'H' and 't'.
64555 in base 61 = HLH and consists of only the digits 'H' and 'L'.

The number 64555 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequence (among others):

Sequence number and description below are taken from OEIS.
A113898: Numbers n such that the value pi(n), the number of primes <= n, can be obtained deleting some of the repeating adjacent digits of n.