725221674 has 20 divisors (see below), whose sum is σ = 1625034114. Its totient is φ = 241740504.

The previous prime is 725221667. The next prime is 725221691. The reversal of 725221674 is 476122527.

It is a happy number.

725221674 is a `hidden beast` number, since 72 + 522 + 1 + 67 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 655616025 + 69605649 = 25605^2 + 8343^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2238177 + ... + 2238500.

Almost surely, 2^725221674 is an apocalyptic number.

725221674 is an abundant number, since it is smaller than the sum of its proper divisors (899812440).

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

725221674 is a wasteful number, since it uses less digits than its factorization.

725221674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4476691 (or 4476682 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 725221674 is about 26929.9401039067. The cubic root of 725221674 is about 898.4424393381.

The spelling of 725221674 in words is "seven hundred twenty-five million, two hundred twenty-one thousand, six hundred seventy-four".