525503121 has 48 divisors (see below), whose sum is σ = 873203520. Its totient is φ = 278467200.

The previous prime is 525503107. The next prime is 525503137. The reversal of 525503121 is 121305525.

It is a happy number.

It is not a de Polignac number, because 525503121 - 2⁷ = 525502993 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 525503091 and 525503100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525503141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86731 + ... + 92591.

It is an arithmetic number, because the mean of its divisors is an integer number (18191740).

Almost surely, 2^525503121 is an apocalyptic number.

It is an amenable number.

525503121 is a deficient number, since it is larger than the sum of its proper divisors (347700399).

525503121 is a wasteful number, since it uses less digits than its factorization.

525503121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5918 (or 5907 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 525503121 is about 22923.8548459896. The cubic root of 525503121 is about 806.9719390964.

Adding to 525503121 its reverse (121305525), we get a palindrome (646808646).

The spelling of 525503121 in words is "five hundred twenty-five million, five hundred three thousand, one hundred twenty-one".