129856674 has 16 divisors (see below), whose sum is σ = 259910208. Its totient is φ = 43252752.

The previous prime is 129856669. The next prime is 129856679. The reversal of 129856674 is 476658921.

It is an interprime number because it is at equal distance from previous prime (129856669) and next prime (129856679).

It is not an unprimeable number, because it can be changed into a prime (129856679) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1204 + ... + 16160.

It is an arithmetic number, because the mean of its divisors is an integer number (16244388).

Almost surely, 2^129856674 is an apocalyptic number.

129856674 is an abundant number, since it is smaller than the sum of its proper divisors (130053534).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129856674 is a wasteful number, since it uses less digits than its factorization.

129856674 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16409.

The product of its digits is 725760, while the sum is 48.

The square root of 129856674 is about 11395.4672567649. The cubic root of 129856674 is about 506.3934641111.

The spelling of 129856674 in words is "one hundred twenty-nine million, eight hundred fifty-six thousand, six hundred seventy-four".