130139281 has 2 divisors, whose sum is σ = 130139282. Its totient is φ = 130139280.

The previous prime is 130139263. The next prime is 130139293. The reversal of 130139281 is 182931031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129754881 + 384400 = 11391^2 + 620^2 .

It is a cyclic number.

It is not a de Polignac number, because 130139281 - 2¹¹ = 130137233 is a prime.

It is a super-2 number, since 2×130139281² = 33872464918393922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (130139231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65069640 + 65069641.

It is an arithmetic number, because the mean of its divisors is an integer number (65069641).

Almost surely, 2^130139281 is an apocalyptic number.

It is an amenable number.

130139281 is a deficient number, since it is larger than the sum of its proper divisors (1).

130139281 is an equidigital number, since it uses as much as digits as its factorization.

130139281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 130139281 is about 11407.8604917837. The cubic root of 130139281 is about 506.7605525368.

The spelling of 130139281 in words is "one hundred thirty million, one hundred thirty-nine thousand, two hundred eighty-one".