11977281 has 8 divisors (see below), whose sum is σ = 17744160. Its totient is φ = 7984836.

The previous prime is 11977267. The next prime is 11977291. The reversal of 11977281 is 18277911.

It is not a de Polignac number, because 11977281 - 2⁵ = 11977249 is a prime.

It is a super-2 number, since 2×11977281² = 286910520305922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11977291) 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, 221775 + ... + 221828.

It is an arithmetic number, because the mean of its divisors is an integer number (2218020).

Almost surely, 2^11977281 is an apocalyptic number.

It is an amenable number.

11977281 is a deficient number, since it is larger than the sum of its proper divisors (5766879).

11977281 is an equidigital number, since it uses as much as digits as its factorization.

11977281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 443612 (or 443606 counting only the distinct ones).

The product of its digits is 7056, while the sum is 36.

The square root of 11977281 is about 3460.8208563865. The cubic root of 11977281 is about 228.7982752185.

The spelling of 11977281 in words is "eleven million, nine hundred seventy-seven thousand, two hundred eighty-one".