11842981 has 8 divisors (see below), whose sum is σ = 12006104. Its totient is φ = 11681280.

The previous prime is 11842937. The next prime is 11842993. The reversal of 11842981 is 18924811.

It can be written as a sum of positive squares in 4 ways, for example, as 50625 + 11792356 = 225^2 + 3434^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 11842981 - 2¹⁵ = 11810213 is a prime.

It is a super-2 number, since 2×11842981² = 280512397932722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11842921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37681 + ... + 37993.

It is an arithmetic number, because the mean of its divisors is an integer number (1500763).

Almost surely, 2^11842981 is an apocalyptic number.

It is an amenable number.

11842981 is a deficient number, since it is larger than the sum of its proper divisors (163123).

11842981 is a wasteful number, since it uses less digits than its factorization.

11842981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711.

The product of its digits is 4608, while the sum is 34.

The square root of 11842981 is about 3441.3632473193. The cubic root of 11842981 is about 227.9398951549.

The spelling of 11842981 in words is "eleven million, eight hundred forty-two thousand, nine hundred eighty-one".