12649219 has 12 divisors (see below), whose sum is σ = 14047992. Its totient is φ = 11380160.

The previous prime is 12649213. The next prime is 12649223. The reversal of 12649219 is 91294621.

It is a de Polignac number, because none of the positive numbers 2^k-12649219 is a prime.

It is a super-2 number, since 2×12649219² = 320005482619922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12649213) 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 in 11 ways as a sum of consecutive naturals, for example, 12459 + ... + 13435.

It is an arithmetic number, because the mean of its divisors is an integer number (1170666).

Almost surely, 2^12649219 is an apocalyptic number.

12649219 is a deficient number, since it is larger than the sum of its proper divisors (1398773).

12649219 is a wasteful number, since it uses less digits than its factorization.

12649219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1106 (or 1095 counting only the distinct ones).

The product of its digits is 7776, while the sum is 34.

The square root of 12649219 is about 3556.5740537770. The cubic root of 12649219 is about 232.9992754802. Note that the first 3 decimals are identical.

The spelling of 12649219 in words is "twelve million, six hundred forty-nine thousand, two hundred nineteen".