12769321 has 4 divisors (see below), whose sum is σ = 12845952. Its totient is φ = 12692692.

The previous prime is 12769319. The next prime is 12769331. The reversal of 12769321 is 12396721.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12769321 - 2¹ = 12769319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12769331) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38065 + ... + 38398.

It is an arithmetic number, because the mean of its divisors is an integer number (3211488).

Almost surely, 2^12769321 is an apocalyptic number.

It is an amenable number.

12769321 is a deficient number, since it is larger than the sum of its proper divisors (76631).

12769321 is an equidigital number, since it uses as much as digits as its factorization.

12769321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76630.

The product of its digits is 4536, while the sum is 31.

The square root of 12769321 is about 3573.4186712447. The cubic root of 12769321 is about 233.7343821721.

The spelling of 12769321 in words is "twelve million, seven hundred sixty-nine thousand, three hundred twenty-one".