725154521 has 16 divisors (see below), whose sum is σ = 898934400. Its totient is φ = 569611008.

The previous prime is 725154517. The next prime is 725154523. The reversal of 725154521 is 125451527.

It is a cyclic number.

It is not a de Polignac number, because 725154521 - 2² = 725154517 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (725154523) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16016 + ... + 41313.

It is an arithmetic number, because the mean of its divisors is an integer number (56183400).

Almost surely, 2^725154521 is an apocalyptic number.

It is an amenable number.

725154521 is a deficient number, since it is larger than the sum of its proper divisors (173779879).

725154521 is a wasteful number, since it uses less digits than its factorization.

725154521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57488.

The product of its digits is 14000, while the sum is 32.

The square root of 725154521 is about 26928.6932657342. The cubic root of 725154521 is about 898.4147076024.

The spelling of 725154521 in words is "seven hundred twenty-five million, one hundred fifty-four thousand, five hundred twenty-one".