11243421 has 64 divisors (see below), whose sum is σ = 20889600. Its totient is φ = 5832000.

The previous prime is 11243413. The next prime is 11243423. The reversal of 11243421 is 12434211.

11243421 is a `hidden beast` number, since 1 + 1 + 243 + 421 = 666.

It is not a de Polignac number, because 11243421 - 2³ = 11243413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11243394 and 11243403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11243423) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 111271 + ... + 111371.

It is an arithmetic number, because the mean of its divisors is an integer number (326400).

Almost surely, 2^11243421 is an apocalyptic number.

11243421 is the 2121-st heptagonal number.

It is an amenable number.

11243421 is a deficient number, since it is larger than the sum of its proper divisors (9646179).

11243421 is a wasteful number, since it uses less digits than its factorization.

11243421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167 (or 161 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 11243421 is about 3353.1210834087. The cubic root of 11243421 is about 224.0265500524.

Adding to 11243421 its reverse (12434211), we get a palindrome (23677632).

It can be divided in two parts, 11243 and 421, that added together give a square (11664 = 108²).

The spelling of 11243421 in words is "eleven million, two hundred forty-three thousand, four hundred twenty-one".