12042440 has 32 divisors (see below), whose sum is σ = 27276480. Its totient is φ = 4784832.

The previous prime is 12042439. The next prime is 12042449. The reversal of 12042440 is 4424021.

It is a super-2 number, since 2×12042440² = 290040722307200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12042449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5597 + ... + 7443.

It is an arithmetic number, because the mean of its divisors is an integer number (852390).

Almost surely, 2^12042440 is an apocalyptic number.

12042440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12042440 is an abundant number, since it is smaller than the sum of its proper divisors (15234040).

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

12042440 is a wasteful number, since it uses less digits than its factorization.

12042440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2021 (or 2017 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 12042440 is about 3470.2218949226. The cubic root of 12042440 is about 229.2124291347.

Adding to 12042440 its reverse (4424021), we get a palindrome (16466461).

The spelling of 12042440 in words is "twelve million, forty-two thousand, four hundred forty".