130158721 has 32 divisors (see below), whose sum is σ = 174873600. Its totient is φ = 93804480.

The previous prime is 130158719. The next prime is 130158727. The reversal of 130158721 is 127851031.

It is not a de Polignac number, because 130158721 - 2¹ = 130158719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130158721.

It is not an unprimeable number, because it can be changed into a prime (130158727) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61875 + ... + 63943.

It is an arithmetic number, because the mean of its divisors is an integer number (5464800).

Almost surely, 2^130158721 is an apocalyptic number.

130158721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130158721 is a deficient number, since it is larger than the sum of its proper divisors (44714879).

130158721 is a wasteful number, since it uses less digits than its factorization.

130158721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2149.

The product of its (nonzero) digits is 1680, while the sum is 28.

The square root of 130158721 is about 11408.7125040471. The cubic root of 130158721 is about 506.7857843104.

It can be divided in two parts, 13015 and 8721, that added together give a triangular number (21736 = T₂₀₈).

The spelling of 130158721 in words is "one hundred thirty million, one hundred fifty-eight thousand, seven hundred twenty-one".