130004721 has 24 divisors (see below), whose sum is σ = 234122304. Its totient is φ = 67534560.

The previous prime is 130004713. The next prime is 130004747. The reversal of 130004721 is 127400031.

It is not a de Polignac number, because 130004721 - 2³ = 130004713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 130004694 and 130004703.

It is not an unprimeable number, because it can be changed into a prime (130004701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 93106 + ... + 94491.

It is an arithmetic number, because the mean of its divisors is an integer number (9755096).

Almost surely, 2^130004721 is an apocalyptic number.

130004721 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

130004721 is a deficient number, since it is larger than the sum of its proper divisors (104117583).

130004721 is a wasteful number, since it uses less digits than its factorization.

130004721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187621 (or 187618 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 130004721 is about 11401.9612786573. The cubic root of 130004721 is about 506.5858340481.

Adding to 130004721 its reverse (127400031), we get a palindrome (257404752).

The spelling of 130004721 in words is "one hundred thirty million, four thousand, seven hundred twenty-one".