130864865 has 8 divisors (see below), whose sum is σ = 157164648. Its totient is φ = 104607360.

The previous prime is 130864859. The next prime is 130864883. The reversal of 130864865 is 568468031.

It can be written as a sum of positive squares in 4 ways, for example, as 5626384 + 125238481 = 2372^2 + 11191^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-130864865 is a prime.

It is a super-2 number, since 2×130864865² = 34251225782936450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3302 + ... + 16511.

It is an arithmetic number, because the mean of its divisors is an integer number (19645581).

Almost surely, 2^130864865 is an apocalyptic number.

130864865 is the 6605-th octagonal number.

It is an amenable number.

130864865 is a deficient number, since it is larger than the sum of its proper divisors (26299783).

130864865 is a wasteful number, since it uses less digits than its factorization.

130864865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21139.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 130864865 is about 11439.6182191540. The cubic root of 130864865 is about 507.7006122850.

The spelling of 130864865 in words is "one hundred thirty million, eight hundred sixty-four thousand, eight hundred sixty-five".