12665240 has 32 divisors (see below), whose sum is σ = 32568480. Its totient is φ = 4342272.

The previous prime is 12665207. The next prime is 12665243. The reversal of 12665240 is 4256621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12665243) 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, 22337 + ... + 22896.

It is an arithmetic number, because the mean of its divisors is an integer number (1017765).

Almost surely, 2^12665240 is an apocalyptic number.

12665240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12665240 is an abundant number, since it is smaller than the sum of its proper divisors (19903240).

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

12665240 is a wasteful number, since it uses less digits than its factorization.

12665240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45251 (or 45247 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 12665240 is about 3558.8256490028. The cubic root of 12665240 is about 233.0976031985.

The spelling of 12665240 in words is "twelve million, six hundred sixty-five thousand, two hundred forty".