725560 has 64 divisors (see below), whose sum is σ = 1905120. Its totient is φ = 245760.

The previous prime is 725537. The next prime is 725579. The reversal of 725560 is 65527.

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

725560 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 15 ways as a sum of consecutive naturals, for example, 7432 + ... + 7528.

2⁷²⁵⁵⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 725560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (952560).

725560 is an abundant number, since it is smaller than the sum of its proper divisors (1179560).

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

725560 is a wasteful number, since it uses less digits than its factorization.

725560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 725560 is about 851.7980981430. The cubic root of 725560 is about 89.8582129583.

The spelling of 725560 in words is "seven hundred twenty-five thousand, five hundred sixty".