25387129 has 2 divisors, whose sum is σ = 25387130. Its totient is φ = 25387128.

The previous prime is 25387123. The next prime is 25387139. The reversal of 25387129 is 92178352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22581504 + 2805625 = 4752^2 + 1675^2 .

It is a cyclic number.

It is not a de Polignac number, because 25387129 - 2⁹ = 25386617 is a prime.

It is not a weakly prime, because it can be changed into another prime (25387123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12693564 + 12693565.

It is an arithmetic number, because the mean of its divisors is an integer number (12693565).

Almost surely, 2^25387129 is an apocalyptic number.

It is an amenable number.

25387129 is a deficient number, since it is larger than the sum of its proper divisors (1).

25387129 is an equidigital number, since it uses as much as digits as its factorization.

25387129 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 25387129 is about 5038.5641803990. The cubic root of 25387129 is about 293.9033456785.

The spelling of 25387129 in words is "twenty-five million, three hundred eighty-seven thousand, one hundred twenty-nine".