12827921 has 2 divisors, whose sum is σ = 12827922. Its totient is φ = 12827920.

The previous prime is 12827917. The next prime is 12827923. The reversal of 12827921 is 12972821.

It is a happy number.

12827921 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10471696 + 2356225 = 3236^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 12827921 - 2² = 12827917 is a prime.

Together with 12827923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12827923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6413960 + 6413961.

It is an arithmetic number, because the mean of its divisors is an integer number (6413961).

Almost surely, 2^12827921 is an apocalyptic number.

It is an amenable number.

12827921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12827921 is an equidigital number, since it uses as much as digits as its factorization.

12827921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 32.

The square root of 12827921 is about 3581.6087167640. The cubic root of 12827921 is about 234.0913819920.

The spelling of 12827921 in words is "twelve million, eight hundred twenty-seven thousand, nine hundred twenty-one".