11838421 has 8 divisors (see below), whose sum is σ = 13582080. Its totient is φ = 10107888.

The previous prime is 11838413. The next prime is 11838433. The reversal of 11838421 is 12483811.

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

It is not a de Polignac number, because 11838421 - 2³ = 11838413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11838421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11838461) 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, 1261 + ... + 5026.

It is an arithmetic number, because the mean of its divisors is an integer number (1697760).

Almost surely, 2^11838421 is an apocalyptic number.

It is an amenable number.

11838421 is a deficient number, since it is larger than the sum of its proper divisors (1743659).

11838421 is an equidigital number, since it uses as much as digits as its factorization.

11838421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6563.

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

The square root of 11838421 is about 3440.7006553898. The cubic root of 11838421 is about 227.9106362109.

It can be divided in two parts, 1183 and 8421, that added together give a square (9604 = 98²).

The spelling of 11838421 in words is "eleven million, eight hundred thirty-eight thousand, four hundred twenty-one".