11442981 has 16 divisors (see below), whose sum is σ = 16777728. Its totient is φ = 6879600.

The previous prime is 11442979. The next prime is 11443009. The reversal of 11442981 is 18924411.

It is not a de Polignac number, because 11442981 - 2¹ = 11442979 is a prime.

It is a super-2 number, since 2×11442981² = 261883628332722, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11442941) 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 15 ways as a sum of consecutive naturals, for example, 3000 + ... + 5646.

It is an arithmetic number, because the mean of its divisors is an integer number (1048608).

Almost surely, 2^11442981 is an apocalyptic number.

11442981 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11442981 is a deficient number, since it is larger than the sum of its proper divisors (5334747).

11442981 is a wasteful number, since it uses less digits than its factorization.

11442981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2792.

The product of its digits is 2304, while the sum is 30.

The square root of 11442981 is about 3382.7475519169. The cubic root of 11442981 is about 225.3442040338.

The spelling of 11442981 in words is "eleven million, four hundred forty-two thousand, nine hundred eighty-one".