12927921 has 8 divisors (see below), whose sum is σ = 17263680. Its totient is φ = 8605392.

The previous prime is 12927883. The next prime is 12927931. The reversal of 12927921 is 12972921.

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

It is not a de Polignac number, because 12927921 - 2⁷ = 12927793 is a prime.

It is a super-2 number, since 2×12927921² = 334262282764482, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12927931) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 741 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (2157960).

Almost surely, 2^12927921 is an apocalyptic number.

It is an amenable number.

12927921 is a deficient number, since it is larger than the sum of its proper divisors (4335759).

12927921 is an equidigital number, since it uses as much as digits as its factorization.

12927921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6615.

The product of its digits is 4536, while the sum is 33.

The square root of 12927921 is about 3595.5418228690. The cubic root of 12927921 is about 234.6980942739.

The spelling of 12927921 in words is "twelve million, nine hundred twenty-seven thousand, nine hundred twenty-one".