25245139 has 2 divisors, whose sum is σ = 25245140. Its totient is φ = 25245138.

The previous prime is 25245133. The next prime is 25245229. The reversal of 25245139 is 93154252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25245139 - 2⁹ = 25244627 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25245139.

It is not a weakly prime, because it can be changed into another prime (25245133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12622569 + 12622570.

It is an arithmetic number, because the mean of its divisors is an integer number (12622570).

Almost surely, 2^25245139 is an apocalyptic number.

25245139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25245139 is an equidigital number, since it uses as much as digits as its factorization.

25245139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 31.

The square root of 25245139 is about 5024.4540997008. The cubic root of 25245139 is about 293.3543879802.

The spelling of 25245139 in words is "twenty-five million, two hundred forty-five thousand, one hundred thirty-nine".