12195540 has 72 divisors (see below), whose sum is σ = 42282240. Its totient is φ = 2787264.

The previous prime is 12195529. The next prime is 12195553. The reversal of 12195540 is 4559121.

12195540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 3580 + ... + 6099.

Almost surely, 2^12195540 is an apocalyptic number.

12195540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12195540 is an abundant number, since it is smaller than the sum of its proper divisors (30086700).

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

12195540 is a wasteful number, since it uses less digits than its factorization.

12195540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9701 (or 9696 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

The square root of 12195540 is about 3492.2113338113. The cubic root of 12195540 is about 230.1796957386.

The spelling of 12195540 in words is "twelve million, one hundred ninety-five thousand, five hundred forty".