12181760 has 72 divisors (see below), whose sum is σ = 30218496. Its totient is φ = 4700160.

The previous prime is 12181759. The next prime is 12181781. The reversal of 12181760 is 6718121.

It is a congruent number.

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, 39527 + ... + 39833.

Almost surely, 2^12181760 is an apocalyptic number.

12181760 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 12181760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15109248).

12181760 is an abundant number, since it is smaller than the sum of its proper divisors (18036736).

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

12181760 is an equidigital number, since it uses as much as digits as its factorization.

12181760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 26.

The square root of 12181760 is about 3490.2378142470. The cubic root of 12181760 is about 230.0929680875.

Adding to 12181760 its reverse (6718121), we get a palindrome (18899881).

The spelling of 12181760 in words is "twelve million, one hundred eighty-one thousand, seven hundred sixty".