129501952 has 18 divisors (see below), whose sum is σ = 258498548. Its totient is φ = 64750848.

The previous prime is 129501923. The next prime is 129501959. The reversal of 129501952 is 259105921.

It is not an unprimeable number, because it can be changed into a prime (129501959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 252678 + ... + 253189.

Almost surely, 2^129501952 is an apocalyptic number.

It is an amenable number.

129501952 is a deficient number, since it is larger than the sum of its proper divisors (128996596).

129501952 is an frugal number, since it uses more digits than its factorization.

129501952 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505883 (or 505869 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 34.

The square root of 129501952 is about 11379.8924423740. The cubic root of 129501952 is about 505.9319483333.

The spelling of 129501952 in words is "one hundred twenty-nine million, five hundred one thousand, nine hundred fifty-two".