129076256 has 12 divisors (see below), whose sum is σ = 254118942. Its totient is φ = 64538112.

The previous prime is 129076249. The next prime is 129076267. The reversal of 129076256 is 652670921.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 110586256 + 18490000 = 10516^2 + 4300^2 .

It is an unprimeable number.

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, 2016785 + ... + 2016848.

Almost surely, 2^129076256 is an apocalyptic number.

129076256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129076256 is a deficient number, since it is larger than the sum of its proper divisors (125042686).

129076256 is an equidigital number, since it uses as much as digits as its factorization.

129076256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4033643 (or 4033635 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 129076256 is about 11361.1731788579. The cubic root of 129076256 is about 505.3769769595.

The spelling of 129076256 in words is "one hundred twenty-nine million, seventy-six thousand, two hundred fifty-six".