12769021 has 2 divisors, whose sum is σ = 12769022. Its totient is φ = 12769020.

The previous prime is 12768997. The next prime is 12769027. The reversal of 12769021 is 12096721.

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., 12425625 + 343396 = 3525^2 + 586^2 .

It is a cyclic number.

It is not a de Polignac number, because 12769021 - 2¹⁵ = 12736253 is a prime.

It is equal to p₈₃₅₁₉₂ and since 12769021 and 835192 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12769027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6384510 + 6384511.

It is an arithmetic number, because the mean of its divisors is an integer number (6384511).

Almost surely, 2^12769021 is an apocalyptic number.

It is an amenable number.

12769021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12769021 is an equidigital number, since it uses as much as digits as its factorization.

12769021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 28.

The square root of 12769021 is about 3573.3766943887. The cubic root of 12769021 is about 233.7325517208.

The spelling of 12769021 in words is "twelve million, seven hundred sixty-nine thousand, twenty-one".