130725921 has 8 divisors (see below), whose sum is σ = 179012224. Its totient is φ = 84795120.

The previous prime is 130725919. The next prime is 130725929. The reversal of 130725921 is 129527031.

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

It is not a de Polignac number, because 130725921 - 2¹ = 130725919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130725929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588745 + ... + 588966.

It is an arithmetic number, because the mean of its divisors is an integer number (22376528).

Almost surely, 2^130725921 is an apocalyptic number.

It is an amenable number.

130725921 is a deficient number, since it is larger than the sum of its proper divisors (48286303).

130725921 is a wasteful number, since it uses less digits than its factorization.

130725921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1177751.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 130725921 is about 11433.5436763936. The cubic root of 130725921 is about 507.5208672371.

The spelling of 130725921 in words is "one hundred thirty million, seven hundred twenty-five thousand, nine hundred twenty-one".