11952181 has 2 divisors, whose sum is σ = 11952182. Its totient is φ = 11952180.

The previous prime is 11952179. The next prime is 11952191. The reversal of 11952181 is 18125911.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8071281 + 3880900 = 2841^2 + 1970^2 .

It is an emirp because it is prime and its reverse (18125911) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11952181 - 2¹ = 11952179 is a prime.

It is a super-2 number, since 2×11952181² = 285709261313522, which contains 22 as substring.

Together with 11952179, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11952191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5976090 + 5976091.

It is an arithmetic number, because the mean of its divisors is an integer number (5976091).

Almost surely, 2^11952181 is an apocalyptic number.

It is an amenable number.

11952181 is a deficient number, since it is larger than the sum of its proper divisors (1).

11952181 is an equidigital number, since it uses as much as digits as its factorization.

11952181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 720, while the sum is 28.

The square root of 11952181 is about 3457.1926472212. The cubic root of 11952181 is about 228.6383376107.

The spelling of 11952181 in words is "eleven million, nine hundred fifty-two thousand, one hundred eighty-one".