129765032 has 8 divisors (see below), whose sum is σ = 243309450. Its totient is φ = 64882512.

The previous prime is 129765017. The next prime is 129765037. The reversal of 129765032 is 230567921.

It can be written as a sum of positive squares in only one way, i.e., 70997476 + 58767556 = 8426^2 + 7666^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×129765032² = 33677927059922048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129764983 and 129765001.

It is not an unprimeable number, because it can be changed into a prime (129765037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8110307 + ... + 8110322.

Almost surely, 2^129765032 is an apocalyptic number.

It is an amenable number.

129765032 is a deficient number, since it is larger than the sum of its proper divisors (113544418).

129765032 is a wasteful number, since it uses less digits than its factorization.

129765032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16220635 (or 16220631 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 129765032 is about 11391.4455623507. The cubic root of 129765032 is about 506.2743126666.

The spelling of 129765032 in words is "one hundred twenty-nine million, seven hundred sixty-five thousand, thirty-two".