129921192 has 32 divisors (see below), whose sum is σ = 360892800. Its totient is φ = 43306992.

The previous prime is 129921167. The next prime is 129921203. The reversal of 129921192 is 291129921.

It is a super-2 number, since 2×129921192² = 33759032261401728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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, 300528 + ... + 300959.

It is an arithmetic number, because the mean of its divisors is an integer number (11277900).

Almost surely, 2^129921192 is an apocalyptic number.

129921192 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129921192 is an abundant number, since it is smaller than the sum of its proper divisors (230971608).

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

129921192 is a wasteful number, since it uses less digits than its factorization.

129921192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 601502 (or 601492 counting only the distinct ones).

The product of its digits is 5832, while the sum is 36.

The square root of 129921192 is about 11398.2977676493. The cubic root of 129921192 is about 506.4773157483.

The spelling of 129921192 in words is "one hundred twenty-nine million, nine hundred twenty-one thousand, one hundred ninety-two".