130641256 has 8 divisors (see below), whose sum is σ = 244952370. Its totient is φ = 65320624.

The previous prime is 130641239. The next prime is 130641257. The reversal of 130641256 is 652146031.

It can be written as a sum of positive squares in only one way, i.e., 119552356 + 11088900 = 10934^2 + 3330^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (130641257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8165071 + ... + 8165086.

Almost surely, 2^130641256 is an apocalyptic number.

It is an amenable number.

130641256 is a deficient number, since it is larger than the sum of its proper divisors (114311114).

130641256 is a wasteful number, since it uses less digits than its factorization.

130641256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16330163 (or 16330159 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 130641256 is about 11429.8405938141. The cubic root of 130641256 is about 507.4112778162.

Adding to 130641256 its reverse (652146031), we get a palindrome (782787287).

The spelling of 130641256 in words is "one hundred thirty million, six hundred forty-one thousand, two hundred fifty-six".