725456 has 10 divisors (see below), whose sum is σ = 1405602. Its totient is φ = 362720.

The previous prime is 725449. The next prime is 725479. The reversal of 725456 is 654527.

It can be written as a sum of positive squares in only one way, i.e., 384400 + 341056 = 620^2 + 584^2 .

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 725456.

It is an unprimeable number.

725456 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 as a sum of consecutive naturals, namely, 22655 + ... + 22686.

2⁷²⁵⁴⁵⁶ is an apocalyptic number.

It is an amenable number.

725456 is a deficient number, since it is larger than the sum of its proper divisors (680146).

725456 is a wasteful number, since it uses less digits than its factorization.

725456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45349 (or 45343 counting only the distinct ones).

The product of its digits is 8400, while the sum is 29.

The square root of 725456 is about 851.7370486248. The cubic root of 725456 is about 89.8539194009.

The spelling of 725456 in words is "seven hundred twenty-five thousand, four hundred fifty-six".