12461591 has 2 divisors, whose sum is σ = 12461592. Its totient is φ = 12461590.

The previous prime is 12461551. The next prime is 12461593. The reversal of 12461591 is 19516421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12461591 is a prime.

It is a super-3 number, since 3×12461591³ (a number of 22 digits) contains 333 as substring.

Together with 12461593, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12461593) 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 as a sum of consecutive naturals, namely, 6230795 + 6230796.

It is an arithmetic number, because the mean of its divisors is an integer number (6230796).

Almost surely, 2^12461591 is an apocalyptic number.

12461591 is a deficient number, since it is larger than the sum of its proper divisors (1).

12461591 is an equidigital number, since it uses as much as digits as its factorization.

12461591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 12461591 is about 3530.0978739973. The cubic root of 12461591 is about 231.8414927498.

The spelling of 12461591 in words is "twelve million, four hundred sixty-one thousand, five hundred ninety-one".