25131251 has 4 divisors (see below), whose sum is σ = 25810512. Its totient is φ = 24451992.

The previous prime is 25131241. The next prime is 25131257. The reversal of 25131251 is 15213152.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25131251 - 2⁶ = 25131187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25131257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 339575 + ... + 339648.

It is an arithmetic number, because the mean of its divisors is an integer number (6452628).

Almost surely, 2^25131251 is an apocalyptic number.

25131251 is a deficient number, since it is larger than the sum of its proper divisors (679261).

25131251 is an equidigital number, since it uses as much as digits as its factorization.

25131251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 679260.

The product of its digits is 300, while the sum is 20.

The square root of 25131251 is about 5013.1079182479. The cubic root of 25131251 is about 292.9125879329.

The spelling of 25131251 in words is "twenty-five million, one hundred thirty-one thousand, two hundred fifty-one".