12761591 has 2 divisors, whose sum is σ = 12761592. Its totient is φ = 12761590.

The previous prime is 12761561. The next prime is 12761603. The reversal of 12761591 is 19516721.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 12761591 - 2¹⁸ = 12499447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12761561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6380795 + 6380796.

It is an arithmetic number, because the mean of its divisors is an integer number (6380796).

Almost surely, 2^12761591 is an apocalyptic number.

12761591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12761591 is an equidigital number, since it uses as much as digits as its factorization.

12761591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3780, while the sum is 32.

The square root of 12761591 is about 3572.3369102032. The cubic root of 12761591 is about 233.6872083906.

The spelling of 12761591 in words is "twelve million, seven hundred sixty-one thousand, five hundred ninety-one".