130442981 has 8 divisors (see below), whose sum is σ = 132164760. Its totient is φ = 128729088.

The previous prime is 130442971. The next prime is 130442993. The reversal of 130442981 is 189244031.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1416100 + 129026881 = 1190^2 + 11359^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 130442981 - 2²² = 126248677 is a prime.

It is a super-2 number, since 2×130442981² = 34030742584332722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130442971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36005 + ... + 39461.

It is an arithmetic number, because the mean of its divisors is an integer number (16520595).

Almost surely, 2^130442981 is an apocalyptic number.

It is an amenable number.

130442981 is a deficient number, since it is larger than the sum of its proper divisors (1721779).

130442981 is an equidigital number, since it uses as much as digits as its factorization.

130442981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3943.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 130442981 is about 11421.1637322998. The cubic root of 130442981 is about 507.1544474845.

The spelling of 130442981 in words is "one hundred thirty million, four hundred forty-two thousand, nine hundred eighty-one".