129530137 has 6 divisors (see below), whose sum is σ = 142376234. Its totient is φ = 117754560.

The previous prime is 129530129. The next prime is 129530143. The reversal of 129530137 is 731035921.

It can be written as a sum of positive squares in only one way, i.e., 66977856 + 62552281 = 8184^2 + 7909^2 .

It is not a de Polignac number, because 129530137 - 2³ = 129530129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 129530099 and 129530108.

It is not an unprimeable number, because it can be changed into a prime (129530197) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 535128 + ... + 535369.

Almost surely, 2^129530137 is an apocalyptic number.

It is an amenable number.

129530137 is a deficient number, since it is larger than the sum of its proper divisors (12846097).

129530137 is a wasteful number, since it uses less digits than its factorization.

129530137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1070519 (or 1070508 counting only the distinct ones).

The product of its (nonzero) digits is 5670, while the sum is 31.

The square root of 129530137 is about 11381.1307434718. The cubic root of 129530137 is about 505.9686496014.

The spelling of 129530137 in words is "one hundred twenty-nine million, five hundred thirty thousand, one hundred thirty-seven".