12165640 has 32 divisors (see below), whose sum is σ = 28258560. Its totient is φ = 4708800.

The previous prime is 12165631. The next prime is 12165661. The reversal of 12165640 is 4656121.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3666 + ... + 6145.

It is an arithmetic number, because the mean of its divisors is an integer number (883080).

Almost surely, 2^12165640 is an apocalyptic number.

12165640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12165640 is an abundant number, since it is smaller than the sum of its proper divisors (16092920).

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

12165640 is a wasteful number, since it uses less digits than its factorization.

12165640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9853 (or 9849 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 12165640 is about 3487.9277515453. The cubic root of 12165640 is about 229.9914300525.

The spelling of 12165640 in words is "twelve million, one hundred sixty-five thousand, six hundred forty".