12291422 has 24 divisors (see below), whose sum is σ = 21830088. Its totient is φ = 5155920.

The previous prime is 12291413. The next prime is 12291427. The reversal of 12291422 is 22419221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12291427) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1193 + ... + 5099.

It is an arithmetic number, because the mean of its divisors is an integer number (909587).

Almost surely, 2^12291422 is an apocalyptic number.

12291422 is a deficient number, since it is larger than the sum of its proper divisors (9538666).

12291422 is a wasteful number, since it uses less digits than its factorization.

12291422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3944 (or 3933 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 12291422 is about 3505.9124347308. The cubic root of 12291422 is about 230.7813501726.

The spelling of 12291422 in words is "twelve million, two hundred ninety-one thousand, four hundred twenty-two".