11857491 has 24 divisors (see below), whose sum is σ = 17886960. Its totient is φ = 7560000.

The previous prime is 11857481. The next prime is 11857493. The reversal of 11857491 is 19475811.

11857491 is a `hidden beast` number, since 118 + 57 + 491 = 666.

11857491 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 11857491 - 2⁹ = 11856979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11857493) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47116 + ... + 47366.

It is an arithmetic number, because the mean of its divisors is an integer number (745290).

Almost surely, 2^11857491 is an apocalyptic number.

11857491 is a deficient number, since it is larger than the sum of its proper divisors (6029469).

11857491 is a wasteful number, since it uses less digits than its factorization.

11857491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 467 (or 464 counting only the distinct ones).

The product of its digits is 10080, while the sum is 36.

The square root of 11857491 is about 3443.4707781539. The cubic root of 11857491 is about 228.0329476855.

The spelling of 11857491 in words is "eleven million, eight hundred fifty-seven thousand, four hundred ninety-one".