725004861 has 16 divisors (see below), whose sum is σ = 1125615744. Its totient is φ = 406471104.

The previous prime is 725004853. The next prime is 725004871. The reversal of 725004861 is 168400527.

It is not a de Polignac number, because 725004861 - 2³ = 725004853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (725004851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 324586 + ... + 326811.

It is an arithmetic number, because the mean of its divisors is an integer number (70350984).

Almost surely, 2^725004861 is an apocalyptic number.

It is an amenable number.

725004861 is a deficient number, since it is larger than the sum of its proper divisors (400610883).

725004861 is a wasteful number, since it uses less digits than its factorization.

725004861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651460.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 725004861 is about 26925.9143020251. The cubic root of 725004861 is about 898.3528973296.

The spelling of 725004861 in words is "seven hundred twenty-five million, four thousand, eight hundred sixty-one".