12442520 has 32 divisors (see below), whose sum is σ = 28155600. Its totient is φ = 4948608.

The previous prime is 12442513. The next prime is 12442531. The reversal of 12442520 is 2524421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 12442492 and 12442501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7091 + ... + 8669.

Almost surely, 2^12442520 is an apocalyptic number.

12442520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12442520 is an abundant number, since it is smaller than the sum of its proper divisors (15713080).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12442520 is a wasteful number, since it uses less digits than its factorization.

12442520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1787 (or 1783 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 12442520 is about 3527.3956398454. The cubic root of 12442520 is about 231.7231636501.

Adding to 12442520 its reverse (2524421), we get a palindrome (14966941).

The spelling of 12442520 in words is "twelve million, four hundred forty-two thousand, five hundred twenty".