11981124 has 36 divisors (see below), whose sum is σ = 32068764. Its totient is φ = 3758592.

The previous prime is 11981117. The next prime is 11981131. The reversal of 11981124 is 42118911.

It is an interprime number because it is at equal distance from previous prime (11981117) and next prime (11981131).

It can be written as a sum of positive squares in 2 ways, for example, as 10497600 + 1483524 = 3240^2 + 1218^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 9177 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (890799).

Almost surely, 2^11981124 is an apocalyptic number.

It is an amenable number.

11981124 is an abundant number, since it is smaller than the sum of its proper divisors (20087640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11981124 is a wasteful number, since it uses less digits than its factorization.

11981124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19604 (or 19599 counting only the distinct ones).

The product of its digits is 576, while the sum is 27.

The square root of 11981124 is about 3461.3760269581. The cubic root of 11981124 is about 228.8227431465.

The spelling of 11981124 in words is "eleven million, nine hundred eighty-one thousand, one hundred twenty-four".