130601721 has 8 divisors (see below), whose sum is σ = 174611584. Its totient is φ = 86829840.

The previous prime is 130601719. The next prime is 130601743. The reversal of 130601721 is 127106031.

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

It is not a de Polignac number, because 130601721 - 2¹ = 130601719 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130601711) 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, 58210 + ... + 60411.

It is an arithmetic number, because the mean of its divisors is an integer number (21826448).

Almost surely, 2^130601721 is an apocalyptic number.

It is an amenable number.

130601721 is a deficient number, since it is larger than the sum of its proper divisors (44009863).

130601721 is a wasteful number, since it uses less digits than its factorization.

130601721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118991.

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 130601721 is about 11428.1109987609. The cubic root of 130601721 is about 507.3600879409.

Adding to 130601721 its reverse (127106031), we get a palindrome (257707752).

The spelling of 130601721 in words is "one hundred thirty million, six hundred one thousand, seven hundred twenty-one".