129999652 has 6 divisors (see below), whose sum is σ = 227499398. Its totient is φ = 64999824.

The previous prime is 129999637. The next prime is 129999673. The reversal of 129999652 is 256999921.

It can be written as a sum of positive squares in only one way, i.e., 128686336 + 1313316 = 11344^2 + 1146^2 .

It is a super-2 number, since 2×129999652² = 33799819040242208, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129999652.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16249953 + ... + 16249960.

Almost surely, 2^129999652 is an apocalyptic number.

It is an amenable number.

129999652 is a deficient number, since it is larger than the sum of its proper divisors (97499746).

129999652 is a wasteful number, since it uses less digits than its factorization.

129999652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32499917 (or 32499915 counting only the distinct ones).

The product of its digits is 787320, while the sum is 52.

The square root of 129999652 is about 11401.7389901716. The cubic root of 129999652 is about 506.5792498847.

The spelling of 129999652 in words is "one hundred twenty-nine million, nine hundred ninety-nine thousand, six hundred fifty-two".