130878081 has 6 divisors (see below), whose sum is σ = 189046130. Its totient is φ = 87252048.

The previous prime is 130878047. The next prime is 130878089. The reversal of 130878081 is 180878031.

It can be written as a sum of positive squares in only one way, i.e., 116316225 + 14561856 = 10785^2 + 3816^2 .

It is not a de Polignac number, because 130878081 - 2⁶ = 130878017 is a prime.

It is a super-2 number, since 2×130878081² = 34258144172485122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130878089) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7270996 + ... + 7271013.

Almost surely, 2^130878081 is an apocalyptic number.

It is an amenable number.

130878081 is a deficient number, since it is larger than the sum of its proper divisors (58168049).

130878081 is a wasteful number, since it uses less digits than its factorization.

130878081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14542015 (or 14542012 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 36.

The square root of 130878081 is about 11440.1958462257. The cubic root of 130878081 is about 507.7177025494.

The spelling of 130878081 in words is "one hundred thirty million, eight hundred seventy-eight thousand, eighty-one".