12942921 has 8 divisors (see below), whose sum is σ = 17678304. Its totient is φ = 8418080.

The previous prime is 12942913. The next prime is 12942929. The reversal of 12942921 is 12924921.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12942913) and next prime (12942929).

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

It is a cyclic number.

It is not a de Polignac number, because 12942921 - 2³ = 12942913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12942929) 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, 52491 + ... + 52736.

It is an arithmetic number, because the mean of its divisors is an integer number (2209788).

Almost surely, 2^12942921 is an apocalyptic number.

It is an amenable number.

12942921 is a deficient number, since it is larger than the sum of its proper divisors (4735383).

12942921 is a wasteful number, since it uses less digits than its factorization.

12942921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105271.

The product of its digits is 2592, while the sum is 30.

The square root of 12942921 is about 3597.6271346542. The cubic root of 12942921 is about 234.7888309751.

The spelling of 12942921 in words is "twelve million, nine hundred forty-two thousand, nine hundred twenty-one".