Number of the day: 146549

Properties of the number 146549:

146549 = 13 × 11273 is semiprime and squarefree.
146549 has 2 distinct prime factors, 4 divisors, 17 antidivisors and 135264 totatives.
146549 has a prime digit sum 29 in base 10.
Reversing the decimal digits of 146549 results in an emirpimes.
146549 = 73275² - 73274² = 5643² - 5630² is the difference of 2 nonnegative squares in 2 ways.
146549 is the sum of 2 positive triangular numbers.
146549 is the difference of 2 positive pentagonal numbers in 2 ways.
146549 = 170² + 343² = 25² + 382² is the sum of 2 positive squares in 2 ways.
146549 = 52² + 63² + 374² is the sum of 3 positive squares.
146549² = 73515² + 126776² = 19100² + 145299² = 88749² + 116620² = 56365² + 135276² is the sum of 2 positive squares in 4 ways.
146549² is the sum of 3 positive squares.
146549 is a divisor of 131¹⁴⁰⁹ - 1.
146549 = '1465' + '49' is the concatenation of 2 semiprime numbers.
146549 is an emirpimes in (at least) the following bases: 4, 5, 10, 11, 13, 16, 17, 21, 22, 27, 29, 31, 33, 36, 39, 42, 44, 48, 52, 56, 58, 61, 64, 65, 69, 77, 79, 82, 83, 85, 88, 89, 92, 97, 99, and 100.
146549 is palindromic in (at least) base -72.

The number 146549 belongs to the following On-Line Encyclopedia of Integer Sequences (OEIS) sequence (among others):

Sequence number and description below are taken from OEIS.
A031618: Numbers n such that continued fraction for sqrt(n) has odd period and central terms 30.