725291123 has 8 divisors (see below), whose sum is σ = 770470800. Its totient is φ = 680812128.

The previous prime is 725291117. The next prime is 725291137. The reversal of 725291123 is 321192527.

725291123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725291123 - 2⁶ = 725291059 is a prime.

It is a super-2 number, since 2×725291123² = 1052094426205202258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 725291123.

It is not an unprimeable number, because it can be changed into a prime (725291183) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173036 + ... + 177177.

It is an arithmetic number, because the mean of its divisors is an integer number (96308850).

Almost surely, 2^725291123 is an apocalyptic number.

725291123 is a deficient number, since it is larger than the sum of its proper divisors (45179677).

725291123 is a wasteful number, since it uses less digits than its factorization.

725291123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350341.

The product of its digits is 7560, while the sum is 32.

The square root of 725291123 is about 26931.2295114798. The cubic root of 725291123 is about 898.4711174373.

The spelling of 725291123 in words is "seven hundred twenty-five million, two hundred ninety-one thousand, one hundred twenty-three".