12724222 has 24 divisors (see below), whose sum is σ = 22370904. Its totient is φ = 5411952.

The previous prime is 12724219. The next prime is 12724223. The reversal of 12724222 is 22242721.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 12724193 and 12724202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12724223) 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, 14973 + ... + 15799.

It is an arithmetic number, because the mean of its divisors is an integer number (932121).

Almost surely, 2^12724222 is an apocalyptic number.

12724222 is a deficient number, since it is larger than the sum of its proper divisors (9646682).

12724222 is a wasteful number, since it uses less digits than its factorization.

12724222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1000 (or 993 counting only the distinct ones).

The product of its digits is 896, while the sum is 22.

The square root of 12724222 is about 3567.1027459270. The cubic root of 12724222 is about 233.4588879836.

Adding to 12724222 its reverse (22242721), we get a palindrome (34966943).

The spelling of 12724222 in words is "twelve million, seven hundred twenty-four thousand, two hundred twenty-two".