11423521 has 4 divisors (see below), whose sum is σ = 11617200. Its totient is φ = 11229844.

The previous prime is 11423501. The next prime is 11423537. The reversal of 11423521 is 12532411.

11423521 is digitally balanced in base 2, 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 a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12532411 = 2131 ⋅5881.

It is a cyclic number.

It is not a de Polignac number, because 11423521 - 2¹⁹ = 10899233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11423501) 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, 96751 + ... + 96868.

It is an arithmetic number, because the mean of its divisors is an integer number (2904300).

Almost surely, 2^11423521 is an apocalyptic number.

It is an amenable number.

11423521 is a deficient number, since it is larger than the sum of its proper divisors (193679).

11423521 is an equidigital number, since it uses as much as digits as its factorization.

11423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193678.

The product of its digits is 240, while the sum is 19.

The square root of 11423521 is about 3379.8699679130. The cubic root of 11423521 is about 225.2163909988.

Adding to 11423521 its reverse (12532411), we get a palindrome (23955932).

The spelling of 11423521 in words is "eleven million, four hundred twenty-three thousand, five hundred twenty-one".