129240275 has 12 divisors (see below), whose sum is σ = 160425000. Its totient is φ = 103284480.

The previous prime is 129240263. The next prime is 129240329. The reversal of 129240275 is 572042921.

It is not a de Polignac number, because 129240275 - 2⁴ = 129240259 is a prime.

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, 29156 + ... + 33294.

It is an arithmetic number, because the mean of its divisors is an integer number (13368750).

Almost surely, 2^129240275 is an apocalyptic number.

129240275 is a deficient number, since it is larger than the sum of its proper divisors (31184725).

129240275 is a wasteful number, since it uses less digits than its factorization.

129240275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5398 (or 5393 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 129240275 is about 11368.3892878455. The cubic root of 129240275 is about 505.5909495452.

The spelling of 129240275 in words is "one hundred twenty-nine million, two hundred forty thousand, two hundred seventy-five".