12442540 has 48 divisors (see below), whose sum is σ = 29756160. Its totient is φ = 4326080.

The previous prime is 12442531. The next prime is 12442553. The reversal of 12442540 is 4524421.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3831 + ... + 6289.

It is an arithmetic number, because the mean of its divisors is an integer number (619920).

Almost surely, 2^12442540 is an apocalyptic number.

12442540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12442540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14878080).

12442540 is an abundant number, since it is smaller than the sum of its proper divisors (17313620).

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

12442540 is a wasteful number, since it uses less digits than its factorization.

12442540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2502 (or 2500 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 12442540 is about 3527.3984747970. The cubic root of 12442540 is about 231.7232878067.

Adding to 12442540 its reverse (4524421), we get a palindrome (16966961).

The spelling of 12442540 in words is "twelve million, four hundred forty-two thousand, five hundred forty".