12104640 has 140 divisors (see below), whose sum is σ = 43150536. Its totient is φ = 3220992.

The previous prime is 12104639. The next prime is 12104669. The reversal of 12104640 is 4640121.

12104640 is a `hidden beast` number, since 1 + 21 + 0 + 4 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 25687 + ... + 26153.

Almost surely, 2^12104640 is an apocalyptic number.

12104640 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 12104640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21575268).

12104640 is an abundant number, since it is smaller than the sum of its proper divisors (31045896).

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

12104640 is an equidigital number, since it uses as much as digits as its factorization.

12104640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496 (or 477 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 12104640 is about 3479.1723153647. The cubic root of 12104640 is about 229.6063841014.

Adding to 12104640 its reverse (4640121), we get a palindrome (16744761).

The spelling of 12104640 in words is "twelve million, one hundred four thousand, six hundred forty".