725535121 has 8 divisors (see below), whose sum is σ = 772924320. Its totient is φ = 679066272.

The previous prime is 725535091. The next prime is 725535127. The reversal of 725535121 is 121535527.

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 725535121 - 2¹⁷ = 725404049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (725535127) 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, 228460 + ... + 231613.

It is an arithmetic number, because the mean of its divisors is an integer number (96615540).

Almost surely, 2^725535121 is an apocalyptic number.

It is an amenable number.

725535121 is a deficient number, since it is larger than the sum of its proper divisors (47389199).

725535121 is a wasteful number, since it uses less digits than its factorization.

725535121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 460175.

The product of its digits is 10500, while the sum is 31.

The square root of 725535121 is about 26935.7591502449. The cubic root of 725535121 is about 898.5718588591.

The spelling of 725535121 in words is "seven hundred twenty-five million, five hundred thirty-five thousand, one hundred twenty-one".