Number of the day: 85501

Bernhard Riemann was born on this day 191 years ago.

Properties of the number 85501:

85501 is a cyclic number.
85501 = 13 × 6577 is semiprime and squarefree.
85501 has 2 distinct prime factors, 4 divisors, 19 antidivisors and 78912 totatives.
85501 has a prime digit sum 19 in base 10.
Reversing the decimal digits of 85501 results in an emirpimes.
85501 = 42751² - 42750² = 3295² - 3282² is the difference of 2 nonnegative squares in 2 ways.
85501 is the sum of 2 positive triangular numbers.
85501 is the difference of 2 positive pentagonal numbers in 2 ways.
85501 = 174² + 235² = 150² + 251² is the sum of 2 positive squares in 2 ways.
85501 = 21² + 46² + 288² is the sum of 3 positive squares.
85501² = 24949² + 81780² = 8424² + 85085² = 40501² + 75300² = 32885² + 78924² is the sum of 2 positive squares in 4 ways.
85501² is the sum of 3 positive squares.
85501 is a proper divisor of 353¹² - 1.
85501 = '85' + '501' is the concatenation of 2 semiprime numbers.
85501 is an emirpimes in (at least) the following bases: 2, 8, 9, 10, 13, 21, 27, 28, 31, 35, 36, 37, 38, 39, 40, 42, 44, 45, 49, 53, 54, 58, 66, 71, 78, 80, 81, 83, 85, 86, 87, 88, 89, and 97.
85501 is palindromic in (at least) the following bases: -14, and -71.
85501 in base 14 = 23233 and consists of only the digits '2' and '3'.