12045240 has 128 divisors (see below), whose sum is σ = 42336000. Its totient is φ = 3037824.

The previous prime is 12045227. The next prime is 12045247. The reversal of 12045240 is 4254021.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12045247) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20227 + ... + 20813.

It is an arithmetic number, because the mean of its divisors is an integer number (330750).

Almost surely, 2^12045240 is an apocalyptic number.

12045240 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 12045240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21168000).

12045240 is an abundant number, since it is smaller than the sum of its proper divisors (30290760).

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

12045240 is a wasteful number, since it uses less digits than its factorization.

12045240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 12045240 is about 3470.6253038898. The cubic root of 12045240 is about 229.2301925632.

Adding to 12045240 its reverse (4254021), we get a palindrome (16299261).

The spelling of 12045240 in words is "twelve million, forty-five thousand, two hundred forty".