252905129 has 2 divisors, whose sum is σ = 252905130. Its totient is φ = 252905128.

The previous prime is 252905123. The next prime is 252905131. The reversal of 252905129 is 921509252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 178169104 + 74736025 = 13348^2 + 8645^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252905129 is a prime.

It is a super-2 number, since 2×252905129² = 127922008549013282, which contains 22 as substring.

Together with 252905131, 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 (252905123) 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, 126452564 + 126452565.

It is an arithmetic number, because the mean of its divisors is an integer number (126452565).

Almost surely, 2^252905129 is an apocalyptic number.

It is an amenable number.

252905129 is a deficient number, since it is larger than the sum of its proper divisors (1).

252905129 is an equidigital number, since it uses as much as digits as its factorization.

252905129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 252905129 is about 15902.9911966271. The cubic root of 252905129 is about 632.3912889970.

The spelling of 252905129 in words is "two hundred fifty-two million, nine hundred five thousand, one hundred twenty-nine".