12749216 has 24 divisors (see below), whose sum is σ = 25220160. Its totient is φ = 6344128.

The previous prime is 12749197. The next prime is 12749239. The reversal of 12749216 is 61294721.

It is a happy number.

It is a super-2 number, since 2×12749216² = 325085017229312, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6815 + ... + 8481.

It is an arithmetic number, because the mean of its divisors is an integer number (1050840).

Almost surely, 2^12749216 is an apocalyptic number.

12749216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12749216 is a deficient number, since it is larger than the sum of its proper divisors (12470944).

12749216 is a wasteful number, since it uses less digits than its factorization.

12749216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1908 counting only the distinct ones).

The product of its digits is 6048, while the sum is 32.

The square root of 12749216 is about 3570.6044306252. The cubic root of 12749216 is about 233.6116479461.

The spelling of 12749216 in words is "twelve million, seven hundred forty-nine thousand, two hundred sixteen".