129960057 has 16 divisors (see below), whose sum is σ = 184023360. Its totient is φ = 81349632.

The previous prime is 129960041. The next prime is 129960137. The reversal of 129960057 is 750069921.

It is not a de Polignac number, because 129960057 - 2⁴ = 129960041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129959997 and 129960024.

It is not an unprimeable number, because it can be changed into a prime (129960157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3648 + ... + 16529.

It is an arithmetic number, because the mean of its divisors is an integer number (11501460).

Almost surely, 2^129960057 is an apocalyptic number.

It is an amenable number.

129960057 is a deficient number, since it is larger than the sum of its proper divisors (54063303).

129960057 is a wasteful number, since it uses less digits than its factorization.

129960057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20312.

The product of its (nonzero) digits is 34020, while the sum is 39.

The square root of 129960057 is about 11400.0024999997. The cubic root of 129960057 is about 506.5278137415.

The spelling of 129960057 in words is "one hundred twenty-nine million, nine hundred sixty thousand, fifty-seven".