25123129 has 2 divisors, whose sum is σ = 25123130. Its totient is φ = 25123128.

The previous prime is 25123103. The next prime is 25123159. The reversal of 25123129 is 92132152.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20457529 + 4665600 = 4523^2 + 2160^2 .

It is a cyclic number.

It is not a de Polignac number, because 25123129 - 2⁷ = 25123001 is a prime.

It is a super-2 number, since 2×25123129² = 1262343221501282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25123159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12561564 + 12561565.

It is an arithmetic number, because the mean of its divisors is an integer number (12561565).

Almost surely, 2^25123129 is an apocalyptic number.

It is an amenable number.

25123129 is a deficient number, since it is larger than the sum of its proper divisors (1).

25123129 is an equidigital number, since it uses as much as digits as its factorization.

25123129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 25.

The square root of 25123129 is about 5012.2977764694. The cubic root of 25123129 is about 292.8810297164.

It can be divided in two parts, 25123 and 129, that added together give a palindrome (25252).

The spelling of 25123129 in words is "twenty-five million, one hundred twenty-three thousand, one hundred twenty-nine".