130344521 has 2 divisors, whose sum is σ = 130344522. Its totient is φ = 130344520.

The previous prime is 130344517. The next prime is 130344563. The reversal of 130344521 is 125443031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126810121 + 3534400 = 11261^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 130344521 - 2² = 130344517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (130344581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65172260 + 65172261.

It is an arithmetic number, because the mean of its divisors is an integer number (65172261).

Almost surely, 2^130344521 is an apocalyptic number.

It is an amenable number.

130344521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130344521 is an equidigital number, since it uses as much as digits as its factorization.

130344521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 130344521 is about 11416.8524997041. The cubic root of 130344521 is about 507.0268131841.

Adding to 130344521 its reverse (125443031), we get a palindrome (255787552).

The spelling of 130344521 in words is "one hundred thirty million, three hundred forty-four thousand, five hundred twenty-one".