25002139 has 2 divisors, whose sum is σ = 25002140. Its totient is φ = 25002138.

The previous prime is 25002137. The next prime is 25002143. The reversal of 25002139 is 93120052.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25002139 - 2¹ = 25002137 is a prime.

Together with 25002137, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25002137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12501069 + 12501070.

It is an arithmetic number, because the mean of its divisors is an integer number (12501070).

Almost surely, 2^25002139 is an apocalyptic number.

25002139 is a deficient number, since it is larger than the sum of its proper divisors (1).

25002139 is an equidigital number, since it uses as much as digits as its factorization.

25002139 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 25002139 is about 5000.2138954249. The cubic root of 25002139 is about 292.4101128821.

The spelling of 25002139 in words is "twenty-five million, two thousand, one hundred thirty-nine".