724956 has 12 divisors (see below), whose sum is σ = 1691592. Its totient is φ = 241648.

The previous prime is 724949. The next prime is 724961. The reversal of 724956 is 659427.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×724956² = 1051122403872, which contains 22 as substring.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

724956 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30195 + ... + 30218.

It is an arithmetic number, because the mean of its divisors is an integer number (140966).

2⁷²⁴⁹⁵⁶ is an apocalyptic number.

724956 is the 539-th centered pentagonal number.

It is an amenable number.

724956 is an abundant number, since it is smaller than the sum of its proper divisors (966636).

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

724956 is a wasteful number, since it uses less digits than its factorization.

724956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60420 (or 60418 counting only the distinct ones).

The product of its digits is 15120, while the sum is 33.

The square root of 724956 is about 851.4434802146. The cubic root of 724956 is about 89.8332715669.

Subtracting from 724956 its product of digits (15120), we obtain a triangular number (709836 = T₁₁₉₁).

The spelling of 724956 in words is "seven hundred twenty-four thousand, nine hundred fifty-six".