130247561 has 4 divisors (see below), whose sum is σ = 130376400. Its totient is φ = 130118724.

The previous prime is 130247543. The next prime is 130247563. The reversal of 130247561 is 165742031.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130247561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130247563) 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, 62891 + ... + 64928.

It is an arithmetic number, because the mean of its divisors is an integer number (32594100).

Almost surely, 2^130247561 is an apocalyptic number.

It is an amenable number.

130247561 is a deficient number, since it is larger than the sum of its proper divisors (128839).

130247561 is a wasteful number, since it uses less digits than its factorization.

130247561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128838.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 130247561 is about 11412.6053554830. The cubic root of 130247561 is about 506.9010605136.

Adding to 130247561 its reverse (165742031), we get a palindrome (295989592).

The spelling of 130247561 in words is "one hundred thirty million, two hundred forty-seven thousand, five hundred sixty-one".