129409274 has 16 divisors (see below), whose sum is σ = 199525920. Its totient is φ = 62914320.

The previous prime is 129409271. The next prime is 129409279. The reversal of 129409274 is 472904921.

It is not an unprimeable number, because it can be changed into a prime (129409271) 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, 16409 + ... + 22979.

It is an arithmetic number, because the mean of its divisors is an integer number (12470370).

Almost surely, 2^129409274 is an apocalyptic number.

129409274 is a deficient number, since it is larger than the sum of its proper divisors (70116646).

129409274 is a wasteful number, since it uses less digits than its factorization.

129409274 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 129409274 is about 11375.8197067288. The cubic root of 129409274 is about 505.8112295587.

The spelling of 129409274 in words is "one hundred twenty-nine million, four hundred nine thousand, two hundred seventy-four".