129142864 has 10 divisors (see below), whose sum is σ = 250214330. Its totient is φ = 64571424.

The previous prime is 129142859. The next prime is 129142877. The reversal of 129142864 is 468241921.

It can be written as a sum of positive squares in only one way, i.e., 84787264 + 44355600 = 9208^2 + 6660^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4035699 + ... + 4035730.

It is an arithmetic number, because the mean of its divisors is an integer number (25021433).

Almost surely, 2^129142864 is an apocalyptic number.

It is an amenable number.

129142864 is a deficient number, since it is larger than the sum of its proper divisors (121071466).

129142864 is an equidigital number, since it uses as much as digits as its factorization.

129142864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8071437 (or 8071431 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 129142864 is about 11364.1041881884. The cubic root of 129142864 is about 505.4638929219.

The spelling of 129142864 in words is "one hundred twenty-nine million, one hundred forty-two thousand, eight hundred sixty-four".