12442521 has 48 divisors (see below), whose sum is σ = 22063104. Its totient is φ = 6160896.

The previous prime is 12442513. The next prime is 12442531. The reversal of 12442521 is 12524421.

12442521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12442521 - 2³ = 12442513 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12442531) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 32296 + ... + 32678.

It is an arithmetic number, because the mean of its divisors is an integer number (459648).

Almost surely, 2^12442521 is an apocalyptic number.

It is an amenable number.

12442521 is a deficient number, since it is larger than the sum of its proper divisors (9620583).

12442521 is a wasteful number, since it uses less digits than its factorization.

12442521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430 (or 423 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 12442521 is about 3527.3957815930. The cubic root of 12442521 is about 231.7231698580.

Adding to 12442521 its reverse (12524421), we get a palindrome (24966942).

It can be divided in two parts, 1244252 and 1, that added together give a triangular number (1244253 = T₁₅₇₇).

The spelling of 12442521 in words is "twelve million, four hundred forty-two thousand, five hundred twenty-one".