12292921 has 4 divisors (see below), whose sum is σ = 13016052. Its totient is φ = 11569792.

The previous prime is 12292919. The next prime is 12292927. The reversal of 12292921 is 12929221.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6817321 + 5475600 = 2611^2 + 2340^2 .

It is not a de Polignac number, because 12292921 - 2¹ = 12292919 is a prime.

It is a super-2 number, since 2×12292921² = 302231813424482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12292921.

It is not an unprimeable number, because it can be changed into a prime (12292927) 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, 361540 + ... + 361573.

It is an arithmetic number, because the mean of its divisors is an integer number (3254013).

Almost surely, 2^12292921 is an apocalyptic number.

It is an amenable number.

12292921 is a deficient number, since it is larger than the sum of its proper divisors (723131).

12292921 is an equidigital number, since it uses as much as digits as its factorization.

12292921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 723130.

The product of its digits is 1296, while the sum is 28.

The square root of 12292921 is about 3506.1262099360. The cubic root of 12292921 is about 230.7907314355.

It can be divided in two parts, 1 and 2292921, that added together give a palindrome (2292922).

The spelling of 12292921 in words is "twelve million, two hundred ninety-two thousand, nine hundred twenty-one".