12876921 has 16 divisors (see below), whose sum is σ = 19321600. Its totient is φ = 8474544.

The previous prime is 12876887. The next prime is 12876923. The reversal of 12876921 is 12967821.

It is not a de Polignac number, because 12876921 - 2¹³ = 12868729 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12876923) 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 15 ways as a sum of consecutive naturals, for example, 886 + ... + 5151.

It is an arithmetic number, because the mean of its divisors is an integer number (1207600).

Almost surely, 2^12876921 is an apocalyptic number.

It is an amenable number.

12876921 is a deficient number, since it is larger than the sum of its proper divisors (6444679).

12876921 is an equidigital number, since it uses as much as digits as its factorization.

12876921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6125 (or 6119 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 12876921 is about 3588.4426984418. The cubic root of 12876921 is about 234.3890634761.

The spelling of 12876921 in words is "twelve million, eight hundred seventy-six thousand, nine hundred twenty-one".