130520561 has 16 divisors (see below), whose sum is σ = 142732800. Its totient is φ = 118966848.

The previous prime is 130520549. The next prime is 130520563. The reversal of 130520561 is 165025031.

It is a cyclic number.

It is not a de Polignac number, because 130520561 - 2¹⁰ = 130519537 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130520563) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 51455 + ... + 53931.

It is an arithmetic number, because the mean of its divisors is an integer number (8920800).

Almost surely, 2^130520561 is an apocalyptic number.

It is an amenable number.

130520561 is a deficient number, since it is larger than the sum of its proper divisors (12212239).

130520561 is a wasteful number, since it uses less digits than its factorization.

130520561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2608.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 130520561 is about 11424.5595538734. The cubic root of 130520561 is about 507.2549696801.

Adding to 130520561 its reverse (165025031), we get a palindrome (295545592).

The spelling of 130520561 in words is "one hundred thirty million, five hundred twenty thousand, five hundred sixty-one".