725494225 has 9 divisors (see below), whose sum is σ = 899779867. Its totient is φ = 580287640.

The previous prime is 725494219. The next prime is 725494241. The reversal of 725494225 is 522494527.

The square root of 725494225 is 26935.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 261177921 + 464316304 = 16161^2 + 21548^2 .

It is not a de Polignac number, because 725494225 - 2⁷ = 725494097 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 131982 + ... + 137368.

Almost surely, 2^725494225 is an apocalyptic number.

725494225 is the 26935-th square number.

725494225 is the 13468-th centered octagonal number.

It is an amenable number.

725494225 is a deficient number, since it is larger than the sum of its proper divisors (174285642).

725494225 is an frugal number, since it uses more digits than its factorization.

725494225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10784 (or 5392 counting only the distinct ones).

The product of its digits is 201600, while the sum is 40.

The cubic root of 725494225 is about 898.5549753735.

The spelling of 725494225 in words is "seven hundred twenty-five million, four hundred ninety-four thousand, two hundred twenty-five".