129159072 has 72 divisors (see below), whose sum is σ = 419773536. Its totient is φ = 36902016.

The previous prime is 129159067. The next prime is 129159073. The reversal of 129159072 is 270951921.

It is a tau number, because it is divible by the number of its divisors (72).

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

It is not an unprimeable number, because it can be changed into a prime (129159073) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30018 + ... + 34049.

It is an arithmetic number, because the mean of its divisors is an integer number (5830188).

Almost surely, 2^129159072 is an apocalyptic number.

129159072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129159072 is an abundant number, since it is smaller than the sum of its proper divisors (290614464).

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

129159072 is a wasteful number, since it uses less digits than its factorization.

129159072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64090 (or 64079 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 36.

The square root of 129159072 is about 11364.8172884565. The cubic root of 129159072 is about 505.4850380213.

It can be divided in two parts, 129 and 159072, that added together give a square (159201 = 399²).

The spelling of 129159072 in words is "one hundred twenty-nine million, one hundred fifty-nine thousand, seventy-two".