130861921 has 4 divisors (see below), whose sum is σ = 132815152. Its totient is φ = 128908692.

The previous prime is 130861889. The next prime is 130861957. The reversal of 130861921 is 129168031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 130861921 - 2⁵ = 130861889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130811921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976515 + ... + 976648.

It is an arithmetic number, because the mean of its divisors is an integer number (33203788).

Almost surely, 2^130861921 is an apocalyptic number.

It is an amenable number.

130861921 is a deficient number, since it is larger than the sum of its proper divisors (1953231).

130861921 is an equidigital number, since it uses as much as digits as its factorization.

130861921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953230.

The product of its (nonzero) digits is 2592, while the sum is 31.

The square root of 130861921 is about 11439.4895428074. The cubic root of 130861921 is about 507.6968050960.

The spelling of 130861921 in words is "one hundred thirty million, eight hundred sixty-one thousand, nine hundred twenty-one".