129240032 has 24 divisors (see below), whose sum is σ = 255660552. Its totient is φ = 64310400.

The previous prime is 129240019. The next prime is 129240053. The reversal of 129240032 is 230042921.

It is a super-2 number, since 2×129240032² = 33405971742722048, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2819 + ... + 16322.

It is an arithmetic number, because the mean of its divisors is an integer number (10652523).

Almost surely, 2^129240032 is an apocalyptic number.

It is an amenable number.

129240032 is a deficient number, since it is larger than the sum of its proper divisors (126420520).

129240032 is a wasteful number, since it uses less digits than its factorization.

129240032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19362 (or 19354 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 129240032 is about 11368.3786003106. The cubic root of 129240032 is about 505.5906326711.

Adding to 129240032 its reverse (230042921), we get a palindrome (359282953).

The spelling of 129240032 in words is "one hundred twenty-nine million, two hundred forty thousand, thirty-two".