12706240 has 56 divisors (see below), whose sum is σ = 30815280. Its totient is φ = 4988928.

The previous prime is 12706237. The next prime is 12706241. The reversal of 12706240 is 4260721.

It is a super-2 number, since 2×12706240² = 322897069875200, which contains 22 as substring.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12706241) 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, 18544 + ... + 19216.

Almost surely, 2^12706240 is an apocalyptic number.

12706240 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 12706240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15407640).

12706240 is an abundant number, since it is smaller than the sum of its proper divisors (18109040).

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

12706240 is an equidigital number, since it uses as much as digits as its factorization.

12706240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 749 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 22.

The square root of 12706240 is about 3564.5813218385. The cubic root of 12706240 is about 233.3488606447.

Adding to 12706240 its reverse (4260721), we get a palindrome (16966961).

The spelling of 12706240 in words is "twelve million, seven hundred six thousand, two hundred forty".