130521637 has 4 divisors (see below), whose sum is σ = 130654336. Its totient is φ = 130388940.

The previous prime is 130521613. The next prime is 130521653. The reversal of 130521637 is 736125031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 736125031 = 1009 ⋅729559.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130521637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130521137) 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, 64863 + ... + 66844.

It is an arithmetic number, because the mean of its divisors is an integer number (32663584).

Almost surely, 2^130521637 is an apocalyptic number.

It is an amenable number.

130521637 is a deficient number, since it is larger than the sum of its proper divisors (132699).

130521637 is an equidigital number, since it uses as much as digits as its factorization.

130521637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132698.

The product of its (nonzero) digits is 3780, while the sum is 28.

The square root of 130521637 is about 11424.6066453073. The cubic root of 130521637 is about 507.2563635980.

Adding to 130521637 its reverse (736125031), we get a palindrome (866646668).

The spelling of 130521637 in words is "one hundred thirty million, five hundred twenty-one thousand, six hundred thirty-seven".