12749147 has 2 divisors, whose sum is σ = 12749148. Its totient is φ = 12749146.

The previous prime is 12749131. The next prime is 12749159. The reversal of 12749147 is 74194721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12749147 - 2⁴ = 12749131 is a prime.

It is not a weakly prime, because it can be changed into another prime (12749197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6374573 + 6374574.

It is an arithmetic number, because the mean of its divisors is an integer number (6374574).

Almost surely, 2^12749147 is an apocalyptic number.

12749147 is a deficient number, since it is larger than the sum of its proper divisors (1).

12749147 is an equidigital number, since it uses as much as digits as its factorization.

12749147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14112, while the sum is 35.

The square root of 12749147 is about 3570.5947683824. The cubic root of 12749147 is about 233.6112265024.

The spelling of 12749147 in words is "twelve million, seven hundred forty-nine thousand, one hundred forty-seven".