12747139 has 2 divisors, whose sum is σ = 12747140. Its totient is φ = 12747138.

The previous prime is 12747131. The next prime is 12747167. The reversal of 12747139 is 93174721.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12747139 - 2³ = 12747131 is a prime.

It is not a weakly prime, because it can be changed into another prime (12747131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6373569 + 6373570.

It is an arithmetic number, because the mean of its divisors is an integer number (6373570).

Almost surely, 2^12747139 is an apocalyptic number.

12747139 is a deficient number, since it is larger than the sum of its proper divisors (1).

12747139 is an equidigital number, since it uses as much as digits as its factorization.

12747139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 34.

The square root of 12747139 is about 3570.3135716629. The cubic root of 12747139 is about 233.5989612119.

The spelling of 12747139 in words is "twelve million, seven hundred forty-seven thousand, one hundred thirty-nine".