25317129 has 4 divisors (see below), whose sum is σ = 33756176. Its totient is φ = 16878084.

The previous prime is 25317121. The next prime is 25317133. The reversal of 25317129 is 92171352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 25317129 - 2³ = 25317121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25317096 and 25317105.

It is not an unprimeable number, because it can be changed into a prime (25317121) 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, 4219519 + ... + 4219524.

It is an arithmetic number, because the mean of its divisors is an integer number (8439044).

Almost surely, 2^25317129 is an apocalyptic number.

It is an amenable number.

25317129 is a deficient number, since it is larger than the sum of its proper divisors (8439047).

25317129 is an equidigital number, since it uses as much as digits as its factorization.

25317129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8439046.

The product of its digits is 3780, while the sum is 30.

The square root of 25317129 is about 5031.6129620630. The cubic root of 25317129 is about 293.6329701916.

The spelling of 25317129 in words is "twenty-five million, three hundred seventeen thousand, one hundred twenty-nine".