725544 has 32 divisors (see below), whose sum is σ = 2016000. Its totient is φ = 241776.

The previous prime is 725537. The next prime is 725579. The reversal of 725544 is 445527.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

725544 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1464 + ... + 1895.

It is an arithmetic number, because the mean of its divisors is an integer number (63000).

2⁷²⁵⁵⁴⁴ is an apocalyptic number.

It is an amenable number.

725544 is an abundant number, since it is smaller than the sum of its proper divisors (1290456).

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

725544 is a wasteful number, since it uses less digits than its factorization.

725544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3374 (or 3364 counting only the distinct ones).

The product of its digits is 5600, while the sum is 27.

The square root of 725544 is about 851.7887061942. The cubic root of 725544 is about 89.8575524377.

The spelling of 725544 in words is "seven hundred twenty-five thousand, five hundred forty-four".