252525139 has 2 divisors, whose sum is σ = 252525140. Its totient is φ = 252525138.

The previous prime is 252525137. The next prime is 252525151. The reversal of 252525139 is 931525252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 252525139 - 2¹ = 252525137 is a prime.

Together with 252525137, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (252525131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126262569 + 126262570.

It is an arithmetic number, because the mean of its divisors is an integer number (126262570).

Almost surely, 2^252525139 is an apocalyptic number.

252525139 is a deficient number, since it is larger than the sum of its proper divisors (1).

252525139 is an equidigital number, since it uses as much as digits as its factorization.

252525139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 252525139 is about 15891.0395821041. The cubic root of 252525139 is about 632.0744075656.

The spelling of 252525139 in words is "two hundred fifty-two million, five hundred twenty-five thousand, one hundred thirty-nine".