12692321 has 4 divisors (see below), whose sum is σ = 12770352. Its totient is φ = 12614292.

The previous prime is 12692311. The next prime is 12692333. The reversal of 12692321 is 12329621.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12329621 = 37 ⋅333233.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12692321 is a prime.

It is a super-2 number, since 2×12692321² = 322190024734082, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12692311) 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 in 3 ways as a sum of consecutive naturals, for example, 38771 + ... + 39096.

It is an arithmetic number, because the mean of its divisors is an integer number (3192588).

Almost surely, 2^12692321 is an apocalyptic number.

It is an amenable number.

12692321 is a deficient number, since it is larger than the sum of its proper divisors (78031).

12692321 is an equidigital number, since it uses as much as digits as its factorization.

12692321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78030.

The product of its digits is 1296, while the sum is 26.

The square root of 12692321 is about 3562.6283836516. The cubic root of 12692321 is about 233.2636224859.

The spelling of 12692321 in words is "twelve million, six hundred ninety-two thousand, three hundred twenty-one".