129464657 has 16 divisors (see below), whose sum is σ = 149732352. Its totient is φ = 109650240.

The previous prime is 129464633. The next prime is 129464669. The reversal of 129464657 is 756464921.

It is not a de Polignac number, because 129464657 - 2²⁰ = 128416081 is a prime.

It is a super-2 number, since 2×129464657² = 33522194824255298, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129464617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307307 + ... + 307727.

It is an arithmetic number, because the mean of its divisors is an integer number (9358272).

Almost surely, 2^129464657 is an apocalyptic number.

It is an amenable number.

129464657 is a deficient number, since it is larger than the sum of its proper divisors (20267695).

129464657 is a wasteful number, since it uses less digits than its factorization.

129464657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 848.

The product of its digits is 362880, while the sum is 44.

The square root of 129464657 is about 11378.2536885060. The cubic root of 129464657 is about 505.8833762376.

The spelling of 129464657 in words is "one hundred twenty-nine million, four hundred sixty-four thousand, six hundred fifty-seven".