11524421 has 4 divisors (see below), whose sum is σ = 11544972. Its totient is φ = 11503872.

The previous prime is 11524369. The next prime is 11524423. The reversal of 11524421 is 12442511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8916196 + 2608225 = 2986^2 + 1615^2 .

It is a cyclic number.

It is not a de Polignac number, because 11524421 - 2²² = 7330117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11524393 and 11524402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11524423) 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, 9410 + ... + 10563.

It is an arithmetic number, because the mean of its divisors is an integer number (2886243).

Almost surely, 2^11524421 is an apocalyptic number.

It is an amenable number.

11524421 is a deficient number, since it is larger than the sum of its proper divisors (20551).

11524421 is an equidigital number, since it uses as much as digits as its factorization.

11524421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20550.

The product of its digits is 320, while the sum is 20.

The square root of 11524421 is about 3394.7637620312. The cubic root of 11524421 is about 225.8775343495.

Adding to 11524421 its reverse (12442511), we get a palindrome (23966932).

The spelling of 11524421 in words is "eleven million, five hundred twenty-four thousand, four hundred twenty-one".