12692221 has 8 divisors (see below), whose sum is σ = 13089024. Its totient is φ = 12298320.

The previous prime is 12692213. The next prime is 12692231. The reversal of 12692221 is 12229621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12692221 - 2³ = 12692213 is a prime.

It is a super-2 number, since 2×12692221² = 322184947825682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12692231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10956 + ... + 12058.

It is an arithmetic number, because the mean of its divisors is an integer number (1636128).

Almost surely, 2^12692221 is an apocalyptic number.

It is an amenable number.

12692221 is a deficient number, since it is larger than the sum of its proper divisors (396803).

12692221 is a wasteful number, since it uses less digits than its factorization.

12692221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1451.

The product of its digits is 864, while the sum is 25.

The square root of 12692221 is about 3562.6143490420. The cubic root of 12692221 is about 233.2630098734.

The spelling of 12692221 in words is "twelve million, six hundred ninety-two thousand, two hundred twenty-one".