130042921 has 2 divisors, whose sum is σ = 130042922. Its totient is φ = 130042920.

The previous prime is 130042919. The next prime is 130042933. The reversal of 130042921 is 129240031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116640000 + 13402921 = 10800^2 + 3661^2 .

It is a cyclic number.

It is not a de Polignac number, because 130042921 - 2¹ = 130042919 is a prime.

It is a super-2 number, since 2×130042921² = 33822322604424482, which contains 22 as substring.

Together with 130042919, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 130042892 and 130042901.

It is not a weakly prime, because it can be changed into another prime (130042951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65021460 + 65021461.

It is an arithmetic number, because the mean of its divisors is an integer number (65021461).

Almost surely, 2^130042921 is an apocalyptic number.

130042921 is the 6096-th centered heptagonal number.

It is an amenable number.

130042921 is a deficient number, since it is larger than the sum of its proper divisors (1).

130042921 is an equidigital number, since it uses as much as digits as its factorization.

130042921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 130042921 is about 11403.6363060210. The cubic root of 130042921 is about 506.6354468202.

Adding to 130042921 its reverse (129240031), we get a palindrome (259282952).

The spelling of 130042921 in words is "one hundred thirty million, forty-two thousand, nine hundred twenty-one".