11406591 has 24 divisors (see below), whose sum is σ = 18921344. Its totient is φ = 6486480.

The previous prime is 11406589. The next prime is 11406613. The reversal of 11406591 is 19560411.

11406591 is a `hidden beast` number, since 1 + 1 + 4 + 0 + 659 + 1 = 666.

It is not a de Polignac number, because 11406591 - 2¹ = 11406589 is a prime.

It is a super-2 number, since 2×11406591² = 260220636482562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11406581) 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, 20580 + ... + 21126.

Almost surely, 2^11406591 is an apocalyptic number.

11406591 is a deficient number, since it is larger than the sum of its proper divisors (7514753).

11406591 is a wasteful number, since it uses less digits than its factorization.

11406591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 891 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 11406591 is about 3377.3645050542. The cubic root of 11406591 is about 225.1050768465.

The spelling of 11406591 in words is "eleven million, four hundred six thousand, five hundred ninety-one".