11845591 has 2 divisors, whose sum is σ = 11845592. Its totient is φ = 11845590.

The previous prime is 11845579. The next prime is 11845609. The reversal of 11845591 is 19554811.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11845591 is a prime.

It is a super-2 number, since 2×11845591² = 280636052278562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11845571) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5922795 + 5922796.

It is an arithmetic number, because the mean of its divisors is an integer number (5922796).

Almost surely, 2^11845591 is an apocalyptic number.

11845591 is a deficient number, since it is larger than the sum of its proper divisors (1).

11845591 is an equidigital number, since it uses as much as digits as its factorization.

11845591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 34.

The square root of 11845591 is about 3441.7424366155. The cubic root of 11845591 is about 227.9566386710.

The spelling of 11845591 in words is "eleven million, eight hundred forty-five thousand, five hundred ninety-one".