12755921 has 2 divisors, whose sum is σ = 12755922. Its totient is φ = 12755920.

The previous prime is 12755909. The next prime is 12755927. The reversal of 12755921 is 12955721.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7756225 + 4999696 = 2785^2 + 2236^2 .

It is a cyclic number.

It is not a de Polignac number, because 12755921 - 2¹⁰ = 12754897 is a prime.

It is a Chen prime.

It is equal to p₈₃₄₃₉₅ and since 12755921 and 834395 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (12755927) 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 as a sum of consecutive naturals, namely, 6377960 + 6377961.

It is an arithmetic number, because the mean of its divisors is an integer number (6377961).

Almost surely, 2^12755921 is an apocalyptic number.

It is an amenable number.

12755921 is a deficient number, since it is larger than the sum of its proper divisors (1).

12755921 is an equidigital number, since it uses as much as digits as its factorization.

12755921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6300, while the sum is 32.

The square root of 12755921 is about 3571.5432238740. The cubic root of 12755921 is about 233.6525940348.

The spelling of 12755921 in words is "twelve million, seven hundred fifty-five thousand, nine hundred twenty-one".