129972292 has 6 divisors (see below), whose sum is σ = 227451518. Its totient is φ = 64986144.

The previous prime is 129972281. The next prime is 129972313. The reversal of 129972292 is 292279921.

It can be written as a sum of positive squares in only one way, i.e., 128686336 + 1285956 = 11344^2 + 1134^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16246533 + ... + 16246540.

Almost surely, 2^129972292 is an apocalyptic number.

It is an amenable number.

129972292 is a deficient number, since it is larger than the sum of its proper divisors (97479226).

129972292 is a wasteful number, since it uses less digits than its factorization.

129972292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32493077 (or 32493075 counting only the distinct ones).

The product of its digits is 81648, while the sum is 43.

The square root of 129972292 is about 11400.5391100597. The cubic root of 129972292 is about 506.5437088134.

The spelling of 129972292 in words is "one hundred twenty-nine million, nine hundred seventy-two thousand, two hundred ninety-two".