725231642 has 16 divisors (see below), whose sum is σ = 1093394472. Its totient is φ = 360771840.

The previous prime is 725231603. The next prime is 725231707. The reversal of 725231642 is 246132527.

It can be written as a sum of positive squares in 4 ways, for example, as 661055521 + 64176121 = 25711^2 + 8011^2 .

It is a junction number, because it is equal to n+sod(n) for n = 725231599 and 725231608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 548342 + ... + 549662.

Almost surely, 2^725231642 is an apocalyptic number.

725231642 is a deficient number, since it is larger than the sum of its proper divisors (368162830).

725231642 is a wasteful number, since it uses less digits than its factorization.

725231642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2513.

The product of its digits is 20160, while the sum is 32.

The square root of 725231642 is about 26930.1251760923. The cubic root of 725231642 is about 898.4465556120.

The spelling of 725231642 in words is "seven hundred twenty-five million, two hundred thirty-one thousand, six hundred forty-two".