129812570 has 16 divisors (see below), whose sum is σ = 233804448. Its totient is φ = 51893520.

The previous prime is 129812533. The next prime is 129812587. The reversal of 129812570 is 75218921.

It is a self number, because there is not a number n which added to its sum of digits gives 129812570.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20705 + ... + 26235.

It is an arithmetic number, because the mean of its divisors is an integer number (14612778).

Almost surely, 2^129812570 is an apocalyptic number.

129812570 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129812570 is a deficient number, since it is larger than the sum of its proper divisors (103991878).

129812570 is a wasteful number, since it uses less digits than its factorization.

129812570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7885.

The product of its (nonzero) digits is 10080, while the sum is 35.

The square root of 129812570 is about 11393.5319370246. The cubic root of 129812570 is about 506.3361278043.

It can be divided in two parts, 12981 and 2570, that added together give a palindrome (15551).

The spelling of 129812570 in words is "one hundred twenty-nine million, eight hundred twelve thousand, five hundred seventy".