12649222 has 4 divisors (see below), whose sum is σ = 18973836. Its totient is φ = 6324610.

The previous prime is 12649213. The next prime is 12649223. The reversal of 12649222 is 22294621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22294621 = 641 ⋅34781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3162304 + ... + 3162307.

It is an arithmetic number, because the mean of its divisors is an integer number (4743459).

Almost surely, 2^12649222 is an apocalyptic number.

12649222 is a deficient number, since it is larger than the sum of its proper divisors (6324614).

12649222 is an equidigital number, since it uses as much as digits as its factorization.

12649222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6324613.

The product of its digits is 3456, while the sum is 28.

The square root of 12649222 is about 3556.5744755312. The cubic root of 12649222 is about 232.9992939002. Note that the first 3 decimals are identical.

The spelling of 12649222 in words is "twelve million, six hundred forty-nine thousand, two hundred twenty-two".