130138506 has 24 divisors (see below), whose sum is σ = 282528324. Its totient is φ = 43293120.

The previous prime is 130138493. The next prime is 130138513. The reversal of 130138506 is 605831031.

It can be written as a sum of positive squares in 2 ways, for example, as 113614281 + 16524225 = 10659^2 + 4065^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 130138506.

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, 2440 + ... + 16316.

Almost surely, 2^130138506 is an apocalyptic number.

130138506 is an abundant number, since it is smaller than the sum of its proper divisors (152389818).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

130138506 is a wasteful number, since it uses less digits than its factorization.

130138506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14406 (or 14403 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 130138506 is about 11407.8265239265. The cubic root of 130138506 is about 506.7595465883.

Adding to 130138506 its reverse (605831031), we get a palindrome (735969537).

The spelling of 130138506 in words is "one hundred thirty million, one hundred thirty-eight thousand, five hundred six".