129957475 has 12 divisors (see below), whose sum is σ = 168154416. Its totient is φ = 99445280.

The previous prime is 129957467. The next prime is 129957493. The reversal of 129957475 is 574759921.

It is a happy number.

It is not a de Polignac number, because 129957475 - 2³ = 129957467 is a prime.

It is a Duffinian number.

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, 112432 + ... + 113581.

It is an arithmetic number, because the mean of its divisors is an integer number (14012868).

Almost surely, 2^129957475 is an apocalyptic number.

129957475 is a deficient number, since it is larger than the sum of its proper divisors (38196941).

129957475 is a wasteful number, since it uses less digits than its factorization.

129957475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226046 (or 226041 counting only the distinct ones).

The product of its digits is 793800, while the sum is 49.

The square root of 129957475 is about 11399.8892538480. The cubic root of 129957475 is about 506.5244592147.

The spelling of 129957475 in words is "one hundred twenty-nine million, nine hundred fifty-seven thousand, four hundred seventy-five".