12897240 has 64 divisors (see below), whose sum is σ = 39951360. Its totient is φ = 3327360.

The previous prime is 12897197. The next prime is 12897251. The reversal of 12897240 is 4279821.

It is a happy number.

12897240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1987 + ... + 5453.

It is an arithmetic number, because the mean of its divisors is an integer number (624240).

Almost surely, 2^12897240 is an apocalyptic number.

12897240 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 12897240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19975680).

12897240 is an abundant number, since it is smaller than the sum of its proper divisors (27054120).

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

12897240 is a wasteful number, since it uses less digits than its factorization.

12897240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3512 (or 3508 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 12897240 is about 3591.2727548879. The cubic root of 12897240 is about 234.5122825947.

The spelling of 12897240 in words is "twelve million, eight hundred ninety-seven thousand, two hundred forty".