129456372 has 24 divisors (see below), whose sum is σ = 311809792. Its totient is φ = 41760000.

The previous prime is 129456337. The next prime is 129456373. The reversal of 129456372 is 273654921.

It is a self number, because there is not a number n which added to its sum of digits gives 129456372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129456373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 173629 + ... + 174372.

Almost surely, 2^129456372 is an apocalyptic number.

129456372 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129456372 is an abundant number, since it is smaller than the sum of its proper divisors (182353420).

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

129456372 is a wasteful number, since it uses less digits than its factorization.

129456372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348039 (or 348037 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 129456372 is about 11377.8896109955. The cubic root of 129456372 is about 505.8725847900.

The spelling of 129456372 in words is "one hundred twenty-nine million, four hundred fifty-six thousand, three hundred seventy-two".