12226642 has 16 divisors (see below), whose sum is σ = 18711000. Its totient is φ = 5991040.

The previous prime is 12226637. The next prime is 12226649. The reversal of 12226642 is 24662221.

It can be written as a sum of positive squares in 4 ways, for example, as 5103081 + 7123561 = 2259^2 + 2669^2 .

It is a super-4 number, since 4×12226642⁴ (a number of 29 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (12226649) 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, 26292 + ... + 26752.

Almost surely, 2^12226642 is an apocalyptic number.

12226642 is a deficient number, since it is larger than the sum of its proper divisors (6484358).

12226642 is a wasteful number, since it uses less digits than its factorization.

12226642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701.

The product of its digits is 2304, while the sum is 25.

The square root of 12226642 is about 3496.6615506794. The cubic root of 12226642 is about 230.3752035951.

Adding to 12226642 its reverse (24662221), we get a palindrome (36888863).

The spelling of 12226642 in words is "twelve million, two hundred twenty-six thousand, six hundred forty-two".