130442321 has 4 divisors (see below), whose sum is σ = 130600500. Its totient is φ = 130284144.

The previous prime is 130442297. The next prime is 130442359. The reversal of 130442321 is 123244031.

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 73273600 + 57168721 = 8560^2 + 7561^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130442321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 130442293 and 130442302.

It is not an unprimeable number, because it can be changed into a prime (130445321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 77846 + ... + 79503.

It is an arithmetic number, because the mean of its divisors is an integer number (32650125).

Almost surely, 2^130442321 is an apocalyptic number.

It is an amenable number.

130442321 is a deficient number, since it is larger than the sum of its proper divisors (158179).

130442321 is an equidigital number, since it uses as much as digits as its factorization.

130442321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158178.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 130442321 is about 11421.1348385351. The cubic root of 130442321 is about 507.1535921363.

Adding to 130442321 its reverse (123244031), we get a palindrome (253686352).

The spelling of 130442321 in words is "one hundred thirty million, four hundred forty-two thousand, three hundred twenty-one".