129402072 has 48 divisors (see below), whose sum is σ = 351341640. Its totient is φ = 43026048.

The previous prime is 129402047. The next prime is 129402073. The reversal of 129402072 is 270204921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129402073) 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, 29868 + ... + 33924.

Almost surely, 2^129402072 is an apocalyptic number.

129402072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129402072 is an abundant number, since it is smaller than the sum of its proper divisors (221939568).

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

129402072 is a wasteful number, since it uses less digits than its factorization.

129402072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4512 (or 4505 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 129402072 is about 11375.5031537071. The cubic root of 129402072 is about 505.8018460992.

Adding to 129402072 its reverse (270204921), we get a palindrome (399606993).

The spelling of 129402072 in words is "one hundred twenty-nine million, four hundred two thousand, seventy-two".