12187080 has 96 divisors (see below), whose sum is σ = 40131000. Its totient is φ = 3207168.

The previous prime is 12187073. The next prime is 12187117. The reversal of 12187080 is 8078121.

It is a Cunningham number, because it is equal to 3491²-1.

It can be written as a sum of positive squares in 4 ways, for example, as 10614564 + 1572516 = 3258^2 + 1254^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34746 + ... + 35094.

Almost surely, 2^12187080 is an apocalyptic number.

12187080 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 12187080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20065500).

12187080 is an abundant number, since it is smaller than the sum of its proper divisors (27943920).

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

12187080 is a wasteful number, since it uses less digits than its factorization.

12187080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 463 (or 456 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 12187080 is about 3490.9998567746. Note that the first 3 decimals coincide. The cubic root of 12187080 is about 230.1264584982.

The spelling of 12187080 in words is "twelve million, one hundred eighty-seven thousand, eighty".