11442421 has 4 divisors (see below), whose sum is σ = 11452000. Its totient is φ = 11432844.

The previous prime is 11442419. The next prime is 11442449. The reversal of 11442421 is 12424411.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12424411 = 461 ⋅26951.

It is a cyclic number.

It is not a de Polignac number, because 11442421 - 2¹ = 11442419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11442121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2691 + ... + 5488.

It is an arithmetic number, because the mean of its divisors is an integer number (2863000).

Almost surely, 2^11442421 is an apocalyptic number.

It is an amenable number.

11442421 is a deficient number, since it is larger than the sum of its proper divisors (9579).

11442421 is an equidigital number, since it uses as much as digits as its factorization.

11442421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9578.

The product of its digits is 256, while the sum is 19.

The square root of 11442421 is about 3382.6647779524. The cubic root of 11442421 is about 225.3405279867.

Adding to 11442421 its reverse (12424411), we get a palindrome (23866832).

The spelling of 11442421 in words is "eleven million, four hundred forty-two thousand, four hundred twenty-one".