725516 has 18 divisors (see below), whose sum is σ = 1396500. Its totient is φ = 329560.

The previous prime is 725507. The next prime is 725519. The reversal of 725516 is 615527.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (725519) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 266 + ... + 1233.

2⁷²⁵⁵¹⁶ is an apocalyptic number.

It is an amenable number.

725516 is a deficient number, since it is larger than the sum of its proper divisors (670984).

725516 is a wasteful number, since it uses less digits than its factorization.

725516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1525 (or 1512 counting only the distinct ones).

The product of its digits is 2100, while the sum is 26.

The square root of 725516 is about 851.7722700347. The cubic root of 725516 is about 89.8563965033.

The spelling of 725516 in words is "seven hundred twenty-five thousand, five hundred sixteen".