129707942 has 16 divisors (see below), whose sum is σ = 239461152. Its totient is φ = 51312960.

The previous prime is 129707939. The next prime is 129707953. The reversal of 129707942 is 249707921.

It is a self number, because there is not a number n which added to its sum of digits gives 129707942.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356159 + ... + 356522.

It is an arithmetic number, because the mean of its divisors is an integer number (14966322).

Almost surely, 2^129707942 is an apocalyptic number.

129707942 is a deficient number, since it is larger than the sum of its proper divisors (109753210).

129707942 is a wasteful number, since it uses less digits than its factorization.

129707942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712703.

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 129707942 is about 11388.9394589663. The cubic root of 129707942 is about 506.2000568117.

The spelling of 129707942 in words is "one hundred twenty-nine million, seven hundred seven thousand, nine hundred forty-two".