11994881 has 4 divisors (see below), whose sum is σ = 12003264. Its totient is φ = 11986500.

The previous prime is 11994869. The next prime is 11994883. The reversal of 11994881 is 18849911.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 18849911 = 2579 ⋅7309.

It is a cyclic number.

It is not a de Polignac number, because 11994881 - 2²² = 7800577 is a prime.

It is a super-2 number, since 2×11994881² = 287754340408322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11994883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1445 + ... + 5106.

It is an arithmetic number, because the mean of its divisors is an integer number (3000816).

Almost surely, 2^11994881 is an apocalyptic number.

It is an amenable number.

11994881 is a deficient number, since it is larger than the sum of its proper divisors (8383).

11994881 is an equidigital number, since it uses as much as digits as its factorization.

11994881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8382.

The product of its digits is 20736, while the sum is 41.

The square root of 11994881 is about 3463.3626723172. The cubic root of 11994881 is about 228.9102894794.

The spelling of 11994881 in words is "eleven million, nine hundred ninety-four thousand, eight hundred eighty-one".