130242521 has 4 divisors (see below), whose sum is σ = 131811792. Its totient is φ = 128673252.

The previous prime is 130242517. The next prime is 130242523. The reversal of 130242521 is 125242031.

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 not a de Polignac number, because 130242521 - 2² = 130242517 is a prime.

It is a super-2 number, since 2×130242521² = 33926228552870882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 130242493 and 130242502.

It is not an unprimeable number, because it can be changed into a prime (130242523) 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 3 ways as a sum of consecutive naturals, for example, 784511 + ... + 784676.

It is an arithmetic number, because the mean of its divisors is an integer number (32952948).

Almost surely, 2^130242521 is an apocalyptic number.

It is an amenable number.

130242521 is a deficient number, since it is larger than the sum of its proper divisors (1569271).

130242521 is an equidigital number, since it uses as much as digits as its factorization.

130242521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569270.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 130242521 is about 11412.3845448705. The cubic root of 130242521 is about 506.8945221588.

Adding to 130242521 its reverse (125242031), we get a palindrome (255484552).

The spelling of 130242521 in words is "one hundred thirty million, two hundred forty-two thousand, five hundred twenty-one".