11924021 has 4 divisors (see below), whose sum is σ = 12625452. Its totient is φ = 11222592.

The previous prime is 11924009. The next prime is 11924047. The reversal of 11924021 is 12042911.

11924021 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12042911 = 31 ⋅388481.

It can be written as a sum of positive squares in 2 ways, for example, as 4558225 + 7365796 = 2135^2 + 2714^2 .

It is a cyclic number.

It is not a de Polignac number, because 11924021 - 2²² = 7729717 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11923984 and 11924002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11924821) 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, 350690 + ... + 350723.

It is an arithmetic number, because the mean of its divisors is an integer number (3156363).

Almost surely, 2^11924021 is an apocalyptic number.

It is an amenable number.

11924021 is a deficient number, since it is larger than the sum of its proper divisors (701431).

11924021 is an equidigital number, since it uses as much as digits as its factorization.

11924021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701430.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 11924021 is about 3453.1175769151. The cubic root of 11924021 is about 228.4586348806.

Adding to 11924021 its reverse (12042911), we get a palindrome (23966932).

The spelling of 11924021 in words is "eleven million, nine hundred twenty-four thousand, twenty-one".