129542032 has 40 divisors (see below), whose sum is σ = 259951616. Its totient is φ = 62487936.

The previous prime is 129542029. The next prime is 129542033. The reversal of 129542032 is 230245921.

It is a super-2 number, since 2×129542032² = 33562276109378048, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129542033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74323 + ... + 76045.

Almost surely, 2^129542032 is an apocalyptic number.

It is an amenable number.

129542032 is an abundant number, since it is smaller than the sum of its proper divisors (130409584).

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

129542032 is a wasteful number, since it uses less digits than its factorization.

129542032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1895 (or 1889 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 129542032 is about 11381.6533069673. The cubic root of 129542032 is about 505.9841371500.

Adding to 129542032 its reverse (230245921), we get a palindrome (359787953).

The spelling of 129542032 in words is "one hundred twenty-nine million, five hundred forty-two thousand, thirty-two".