11842381 has 4 divisors (see below), whose sum is σ = 11850592. Its totient is φ = 11834172.

The previous prime is 11842349. The next prime is 11842393. The reversal of 11842381 is 18324811.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11842381 - 2⁵ = 11842349 is a prime.

It is a super-2 number, since 2×11842381² = 280483975498322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11846381) 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 3 ways as a sum of consecutive naturals, for example, 1305 + ... + 5038.

It is an arithmetic number, because the mean of its divisors is an integer number (2962648).

Almost surely, 2^11842381 is an apocalyptic number.

It is an amenable number.

11842381 is a deficient number, since it is larger than the sum of its proper divisors (8211).

11842381 is an equidigital number, since it uses as much as digits as its factorization.

11842381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8210.

The product of its digits is 1536, while the sum is 28.

The square root of 11842381 is about 3441.2760714595. The cubic root of 11842381 is about 227.9360457230.

The spelling of 11842381 in words is "eleven million, eight hundred forty-two thousand, three hundred eighty-one".