129256652 has 36 divisors (see below), whose sum is σ = 261470160. Its totient is φ = 54768480.

The previous prime is 129256643. The next prime is 129256681. The reversal of 129256652 is 256652921.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 480374 + ... + 480642.

It is an arithmetic number, because the mean of its divisors is an integer number (7263060).

Almost surely, 2^129256652 is an apocalyptic number.

It is an amenable number.

129256652 is an abundant number, since it is smaller than the sum of its proper divisors (132213508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129256652 is a wasteful number, since it uses less digits than its factorization.

129256652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 409 counting only the distinct ones).

The product of its digits is 64800, while the sum is 38.

The square root of 129256652 is about 11369.1095517635. The cubic root of 129256652 is about 505.6123043776.

The spelling of 129256652 in words is "one hundred twenty-nine million, two hundred fifty-six thousand, six hundred fifty-two".