12749247 has 24 divisors (see below), whose sum is σ = 22156160. Its totient is φ = 6901200.

The previous prime is 12749239. The next prime is 12749263. The reversal of 12749247 is 74294721.

12749247 is a `hidden beast` number, since 127 + 492 + 47 = 666.

It is not a de Polignac number, because 12749247 - 2³ = 12749239 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12749147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4129 + ... + 6522.

Almost surely, 2^12749247 is an apocalyptic number.

12749247 is a deficient number, since it is larger than the sum of its proper divisors (9406913).

12749247 is a wasteful number, since it uses less digits than its factorization.

12749247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10683 (or 10680 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 12749247 is about 3570.6087716242. The cubic root of 12749247 is about 233.6118372899.

It can be divided in two parts, 12749 and 247, that added together give a square (12996 = 114²).

The spelling of 12749247 in words is "twelve million, seven hundred forty-nine thousand, two hundred forty-seven".