11571994 has 8 divisors (see below), whose sum is σ = 19837728. Its totient is φ = 4959420.

The previous prime is 11571983. The next prime is 11572037. The reversal of 11571994 is 49917511.

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

It is a super-2 number, since 2×11571994² = 267822090272072, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 413272 + ... + 413299.

It is an arithmetic number, because the mean of its divisors is an integer number (2479716).

Almost surely, 2^11571994 is an apocalyptic number.

11571994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

11571994 is a deficient number, since it is larger than the sum of its proper divisors (8265734).

11571994 is an equidigital number, since it uses as much as digits as its factorization.

11571994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826580.

The product of its digits is 11340, while the sum is 37.

The square root of 11571994 is about 3401.7633662558. The cubic root of 11571994 is about 226.1879163824.

The spelling of 11571994 in words is "eleven million, five hundred seventy-one thousand, nine hundred ninety-four".