12168540 has 72 divisors (see below), whose sum is σ = 37499280. Its totient is φ = 3193344.

The previous prime is 12168517. The next prime is 12168551. The reversal of 12168540 is 4586121.

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, 11556 + ... + 12564.

Almost surely, 2^12168540 is an apocalyptic number.

12168540 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 12168540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18749640).

12168540 is an abundant number, since it is smaller than the sum of its proper divisors (25330740).

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

12168540 is a wasteful number, since it uses less digits than its factorization.

12168540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1091 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12168540 is about 3488.3434463940. The cubic root of 12168540 is about 230.0097034343.

The spelling of 12168540 in words is "twelve million, one hundred sixty-eight thousand, five hundred forty".