725715642 has 32 divisors (see below), whose sum is σ = 1563402240. Its totient is φ = 223922160.

The previous prime is 725715631. The next prime is 725715667. The reversal of 725715642 is 246517527.

It is a self number, because there is not a number n which added to its sum of digits gives 725715642.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80542 + ... + 89097.

It is an arithmetic number, because the mean of its divisors is an integer number (48856320).

Almost surely, 2^725715642 is an apocalyptic number.

725715642 is an abundant number, since it is smaller than the sum of its proper divisors (837686598).

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

725715642 is a wasteful number, since it uses less digits than its factorization.

725715642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169698.

The product of its digits is 117600, while the sum is 39.

The square root of 725715642 is about 26939.1098962085. The cubic root of 725715642 is about 898.6463774842.

The spelling of 725715642 in words is "seven hundred twenty-five million, seven hundred fifteen thousand, six hundred forty-two".