129253457 has 2 divisors, whose sum is σ = 129253458. Its totient is φ = 129253456.

The previous prime is 129253429. The next prime is 129253507. The reversal of 129253457 is 754352921.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129026881 + 226576 = 11359^2 + 476^2 .

It is a cyclic number.

It is not a de Polignac number, because 129253457 - 2²⁴ = 112476241 is a prime.

It is a super-2 number, since 2×129253457² = 33412912292901698, which contains 22 as substring.

It is a Chen prime.

It is equal to p_7338269 and since 129253457 and 7338269 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129253457.

It is not a weakly prime, because it can be changed into another prime (129253417) 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, 64626728 + 64626729.

It is an arithmetic number, because the mean of its divisors is an integer number (64626729).

Almost surely, 2^129253457 is an apocalyptic number.

It is an amenable number.

129253457 is a deficient number, since it is larger than the sum of its proper divisors (1).

129253457 is an equidigital number, since it uses as much as digits as its factorization.

129253457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 75600, while the sum is 38.

The square root of 129253457 is about 11368.9690385716. The cubic root of 129253457 is about 505.6081383906.

The spelling of 129253457 in words is "one hundred twenty-nine million, two hundred fifty-three thousand, four hundred fifty-seven".