129812824 has 16 divisors (see below), whose sum is σ = 243983520. Its totient is φ = 64750560.

The previous prime is 129812821. The next prime is 129812827. The reversal of 129812824 is 428218921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (129812821) and next prime (129812827).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129812821) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15904 + ... + 22639.

It is an arithmetic number, because the mean of its divisors is an integer number (15248970).

Almost surely, 2^129812824 is an apocalyptic number.

It is an amenable number.

129812824 is a deficient number, since it is larger than the sum of its proper divisors (114170696).

129812824 is a wasteful number, since it uses less digits than its factorization.

129812824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38970 (or 38966 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 129812824 is about 11393.5430836944. The cubic root of 129812824 is about 506.3364580478.

The spelling of 129812824 in words is "one hundred twenty-nine million, eight hundred twelve thousand, eight hundred twenty-four".