12192540 has 24 divisors (see below), whose sum is σ = 34139280. Its totient is φ = 3251328.

The previous prime is 12192511. The next prime is 12192541. The reversal of 12192540 is 4529121.

It is a self number, because there is not a number n which added to its sum of digits gives 12192540.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12192541) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 101545 + ... + 101664.

It is an arithmetic number, because the mean of its divisors is an integer number (1422470).

Almost surely, 2^12192540 is an apocalyptic number.

12192540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12192540 is an abundant number, since it is smaller than the sum of its proper divisors (21946740).

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

12192540 is a wasteful number, since it uses less digits than its factorization.

12192540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203221 (or 203219 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 12192540 is about 3491.7817801232. The cubic root of 12192540 is about 230.1608201027.

The spelling of 12192540 in words is "twelve million, one hundred ninety-two thousand, five hundred forty".