525905121 has 16 divisors (see below), whose sum is σ = 805537664. Its totient is φ = 298957824.

The previous prime is 525905119. The next prime is 525905131. The reversal of 525905121 is 121509525.

It is not a de Polignac number, because 525905121 - 2¹ = 525905119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (525905101) 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, 60826 + ... + 68931.

It is an arithmetic number, because the mean of its divisors is an integer number (50346104).

Almost surely, 2^525905121 is an apocalyptic number.

It is an amenable number.

525905121 is a deficient number, since it is larger than the sum of its proper divisors (279632543).

525905121 is a wasteful number, since it uses less digits than its factorization.

525905121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129960.

The product of its (nonzero) digits is 4500, while the sum is 30.

The square root of 525905121 is about 22932.6213285791. The cubic root of 525905121 is about 807.1776594312.

The spelling of 525905121 in words is "five hundred twenty-five million, nine hundred five thousand, one hundred twenty-one".