253121525 has 12 divisors (see below), whose sum is σ = 314316192. Its totient is φ = 202209840.

The previous prime is 253121507. The next prime is 253121543. The reversal of 253121525 is 525121352.

It is an interprime number because it is at equal distance from previous prime (253121507) and next prime (253121543).

It is not a de Polignac number, because 253121525 - 2¹⁰ = 253120501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253121494 and 253121503.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11762 + ... + 25388.

It is an arithmetic number, because the mean of its divisors is an integer number (26193016).

Almost surely, 2^253121525 is an apocalyptic number.

253121525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253121525 is a deficient number, since it is larger than the sum of its proper divisors (61194667).

253121525 is a wasteful number, since it uses less digits than its factorization.

253121525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14380 (or 14375 counting only the distinct ones).

The product of its digits is 3000, while the sum is 26.

The square root of 253121525 is about 15909.7933676085. The cubic root of 253121525 is about 632.5716042189.

Adding to 253121525 its reverse (525121352), we get a palindrome (778242877).

The spelling of 253121525 in words is "two hundred fifty-three million, one hundred twenty-one thousand, five hundred twenty-five".