129137452 has 12 divisors (see below), whose sum is σ = 237884920. Its totient is φ = 61170336.

The previous prime is 129137447. The next prime is 129137453. The reversal of 129137452 is 254731921.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (129137453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 849513 + ... + 849664.

Almost surely, 2^129137452 is an apocalyptic number.

It is an amenable number.

129137452 is a deficient number, since it is larger than the sum of its proper divisors (108747468).

129137452 is a wasteful number, since it uses less digits than its factorization.

129137452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1699200 (or 1699198 counting only the distinct ones).

The product of its digits is 15120, while the sum is 34.

The square root of 129137452 is about 11363.8660674966. The cubic root of 129137452 is about 505.4568319851.

The spelling of 129137452 in words is "one hundred twenty-nine million, one hundred thirty-seven thousand, four hundred fifty-two".