11868591 has 8 divisors (see below), whose sum is σ = 18085504. Its totient is φ = 6782040.

The previous prime is 11868589. The next prime is 11868607. The reversal of 11868591 is 19586811.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11868591 - 2¹ = 11868589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11868541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 282565 + ... + 282606.

It is an arithmetic number, because the mean of its divisors is an integer number (2260688).

Almost surely, 2^11868591 is an apocalyptic number.

11868591 is a deficient number, since it is larger than the sum of its proper divisors (6216913).

11868591 is an equidigital number, since it uses as much as digits as its factorization.

11868591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 565181.

The product of its digits is 17280, while the sum is 39.

The square root of 11868591 is about 3445.0821470612. The cubic root of 11868591 is about 228.1040806738.

The spelling of 11868591 in words is "eleven million, eight hundred sixty-eight thousand, five hundred ninety-one".