745556 has 12 divisors (see below), whose sum is σ = 1491168. Its totient is φ = 319512.

The previous prime is 745543. The next prime is 745567. The reversal of 745556 is 655547.

It is a happy number.

745556 is an admirable number.

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13286 + ... + 13341.

It is an arithmetic number, because the mean of its divisors is an integer number (124264).

2⁷⁴⁵⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

745556 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745556 is a wasteful number, since it uses less digits than its factorization.

745556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26638 (or 26636 counting only the distinct ones).

The product of its digits is 21000, while the sum is 32.

The square root of 745556 is about 863.4558471630. The cubic root of 745556 is about 90.6762232814.

Subtracting from 745556 its reverse (655547), we obtain a palindrome (90009).

The spelling of 745556 in words is "seven hundred forty-five thousand, five hundred fifty-six".