12442240 has 32 divisors (see below), whose sum is σ = 29746260. Its totient is φ = 4976640.

The previous prime is 12442237. The next prime is 12442259. The reversal of 12442240 is 4224421.

12442240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11888704 + 553536 = 3448^2 + 744^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9081 + ... + 10360.

Almost surely, 2^12442240 is an apocalyptic number.

12442240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12442240 is an abundant number, since it is smaller than the sum of its proper divisors (17304020).

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

12442240 is an equidigital number, since it uses as much as digits as its factorization.

12442240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19460 (or 19448 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 12442240 is about 3527.3559502834. The cubic root of 12442240 is about 231.7214254446.

Adding to 12442240 its reverse (4224421), we get a palindrome (16666661).

The spelling of 12442240 in words is "twelve million, four hundred forty-two thousand, two hundred forty".