12547091 has 2 divisors, whose sum is σ = 12547092. Its totient is φ = 12547090.

The previous prime is 12547081. The next prime is 12547109. The reversal of 12547091 is 19074521.

Together with next prime (12547109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 12547091 - 2¹⁸ = 12284947 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (12547081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6273545 + 6273546.

It is an arithmetic number, because the mean of its divisors is an integer number (6273546).

Almost surely, 2^12547091 is an apocalyptic number.

12547091 is a deficient number, since it is larger than the sum of its proper divisors (1).

12547091 is an equidigital number, since it uses as much as digits as its factorization.

12547091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 12547091 is about 3542.1873185928. The cubic root of 12547091 is about 232.3705125506.

The spelling of 12547091 in words is "twelve million, five hundred forty-seven thousand, ninety-one".