252521025 has 24 divisors (see below), whose sum is σ = 435656640. Its totient is φ = 128821440.

The previous prime is 252521023. The next prime is 252521033. The reversal of 252521025 is 520125252.

It is not a de Polignac number, because 252521025 - 2¹ = 252521023 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 252520986 and 252521004.

It is not an unprimeable number, because it can be changed into a prime (252521023) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 71470 + ... + 74919.

It is an arithmetic number, because the mean of its divisors is an integer number (18152360).

Almost surely, 2^252521025 is an apocalyptic number.

252521025 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

252521025 is a deficient number, since it is larger than the sum of its proper divisors (183135615).

252521025 is a wasteful number, since it uses less digits than its factorization.

252521025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146425 (or 146420 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 252521025 is about 15890.9101375598. The cubic root of 252521025 is about 632.0709750780.

Adding to 252521025 its reverse (520125252), we get a palindrome (772646277).

The spelling of 252521025 in words is "two hundred fifty-two million, five hundred twenty-one thousand, twenty-five".