12170640 has 160 divisors (see below), whose sum is σ = 42318720. Its totient is φ = 2875392.

The previous prime is 12170629. The next prime is 12170647. The reversal of 12170640 is 4607121.

12170640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (12170647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77442 + ... + 77598.

It is an arithmetic number, because the mean of its divisors is an integer number (264492).

Almost surely, 2^12170640 is an apocalyptic number.

12170640 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 12170640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21159360).

12170640 is an abundant number, since it is smaller than the sum of its proper divisors (30148080).

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

12170640 is a wasteful number, since it uses less digits than its factorization.

12170640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 12170640 is about 3488.6444358805. The cubic root of 12170640 is about 230.0229340710.

Adding to 12170640 its reverse (4607121), we get a palindrome (16777761).

The spelling of 12170640 in words is "twelve million, one hundred seventy thousand, six hundred forty".