130448561 has 4 divisors (see below), whose sum is σ = 132587124. Its totient is φ = 128310000.

The previous prime is 130448557. The next prime is 130448579. The reversal of 130448561 is 165844031.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27040000 + 103408561 = 5200^2 + 10169^2 .

It is a cyclic number.

It is not a de Polignac number, because 130448561 - 2² = 130448557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (130448761) 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, 1069190 + ... + 1069311.

It is an arithmetic number, because the mean of its divisors is an integer number (33146781).

Almost surely, 2^130448561 is an apocalyptic number.

It is an amenable number.

130448561 is a deficient number, since it is larger than the sum of its proper divisors (2138563).

130448561 is an equidigital number, since it uses as much as digits as its factorization.

130448561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2138562.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 130448561 is about 11421.4080130254. The cubic root of 130448561 is about 507.1616789493.

The spelling of 130448561 in words is "one hundred thirty million, four hundred forty-eight thousand, five hundred sixty-one".