129986156 has 12 divisors (see below), whose sum is σ = 237366192. Its totient is φ = 62167248.

The previous prime is 129986147. The next prime is 129986159. The reversal of 129986156 is 651689921.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 129986156.

It is not an unprimeable number, because it can be changed into a prime (129986159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 706355 + ... + 706538.

It is an arithmetic number, because the mean of its divisors is an integer number (19780516).

Almost surely, 2^129986156 is an apocalyptic number.

It is an amenable number.

129986156 is a deficient number, since it is larger than the sum of its proper divisors (107380036).

129986156 is a wasteful number, since it uses less digits than its factorization.

129986156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1412920 (or 1412918 counting only the distinct ones).

The product of its digits is 233280, while the sum is 47.

The square root of 129986156 is about 11401.1471352667. The cubic root of 129986156 is about 506.5617189912.

The spelling of 129986156 in words is "one hundred twenty-nine million, nine hundred eighty-six thousand, one hundred fifty-six".