12749217 has 8 divisors (see below), whose sum is σ = 18306624. Its totient is φ = 7845648.

The previous prime is 12749197. The next prime is 12749239. The reversal of 12749217 is 71294721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12749217 - 2¹⁰ = 12748193 is a prime.

It is a super-2 number, since 2×12749217² = 325085068226178, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12749017) 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, 163413 + ... + 163490.

It is an arithmetic number, because the mean of its divisors is an integer number (2288328).

Almost surely, 2^12749217 is an apocalyptic number.

It is an amenable number.

12749217 is a deficient number, since it is larger than the sum of its proper divisors (5557407).

12749217 is a wasteful number, since it uses less digits than its factorization.

12749217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326919.

The product of its digits is 7056, while the sum is 33.

The square root of 12749217 is about 3570.6045706575. The cubic root of 12749217 is about 233.6116540540.

The spelling of 12749217 in words is "twelve million, seven hundred forty-nine thousand, two hundred seventeen".