12423521 has 8 divisors (see below), whose sum is σ = 13661184. Its totient is φ = 11203920.

The previous prime is 12423491. The next prime is 12423539. The reversal of 12423521 is 12532421.

12423521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12423521 - 2⁶ = 12423457 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12423493 and 12423502.

It is not an unprimeable number, because it can be changed into a prime (12423581) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3050 + ... + 5843.

It is an arithmetic number, because the mean of its divisors is an integer number (1707648).

Almost surely, 2^12423521 is an apocalyptic number.

12423521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12423521 is a deficient number, since it is larger than the sum of its proper divisors (1237663).

12423521 is a wasteful number, since it uses less digits than its factorization.

12423521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9031.

The product of its digits is 480, while the sum is 20.

The square root of 12423521 is about 3524.7015476491. The cubic root of 12423521 is about 231.6051609979.

Adding to 12423521 its reverse (12532421), we get a palindrome (24955942).

Subtracting 12423521 from its reverse (12532421), we obtain a square (108900 = 330²).

The spelling of 12423521 in words is "twelve million, four hundred twenty-three thousand, five hundred twenty-one".