12426240 has 88 divisors (see below), whose sum is σ = 39793680. Its totient is φ = 3309568.

The previous prime is 12426223. The next prime is 12426241. The reversal of 12426240 is 4262421.

It is a super-2 number, since 2×12426240² = 308822881075200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12426241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14956 + ... + 15764.

Almost surely, 2^12426240 is an apocalyptic number.

12426240 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 12426240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19896840).

12426240 is an abundant number, since it is smaller than the sum of its proper divisors (27367440).

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

12426240 is an equidigital number, since it uses as much as digits as its factorization.

12426240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 837 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 12426240 is about 3525.0872329632. The cubic root of 12426240 is about 231.6220560606.

Adding to 12426240 its reverse (4262421), we get a palindrome (16688661).

The spelling of 12426240 in words is "twelve million, four hundred twenty-six thousand, two hundred forty".