25855129 has 2 divisors, whose sum is σ = 25855130. Its totient is φ = 25855128.

The previous prime is 25855121. The next prime is 25855171. The reversal of 25855129 is 92155852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24800400 + 1054729 = 4980^2 + 1027^2 .

It is a cyclic number.

It is not a de Polignac number, because 25855129 - 2³ = 25855121 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25855121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12927564 + 12927565.

It is an arithmetic number, because the mean of its divisors is an integer number (12927565).

Almost surely, 2^25855129 is an apocalyptic number.

It is an amenable number.

25855129 is a deficient number, since it is larger than the sum of its proper divisors (1).

25855129 is an equidigital number, since it uses as much as digits as its factorization.

25855129 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36000, while the sum is 37.

The square root of 25855129 is about 5084.7938994614. The cubic root of 25855129 is about 295.6983512394.

The spelling of 25855129 in words is "twenty-five million, eight hundred fifty-five thousand, one hundred twenty-nine".