725416 has 8 divisors (see below), whose sum is σ = 1360170. Its totient is φ = 362704.

The previous prime is 725399. The next prime is 725423. The reversal of 725416 is 614527.

It can be written as a sum of positive squares in only one way, i.e., 722500 + 2916 = 850^2 + 54^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45331 + ... + 45346.

2⁷²⁵⁴¹⁶ is an apocalyptic number.

It is an amenable number.

725416 is a deficient number, since it is larger than the sum of its proper divisors (634754).

725416 is a wasteful number, since it uses less digits than its factorization.

725416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90683 (or 90679 counting only the distinct ones).

The product of its digits is 1680, while the sum is 25.

The square root of 725416 is about 851.7135668756. The cubic root of 725416 is about 89.8522679233.

Subtracting from 725416 its reverse (614527), we obtain a square (110889 = 333²).

The spelling of 725416 in words is "seven hundred twenty-five thousand, four hundred sixteen".