12016540 has 12 divisors (see below), whose sum is σ = 25234776. Its totient is φ = 4806608.

The previous prime is 12016507. The next prime is 12016541. The reversal of 12016540 is 4561021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12016541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300394 + ... + 300433.

It is an arithmetic number, because the mean of its divisors is an integer number (2102898).

Almost surely, 2^12016540 is an apocalyptic number.

12016540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12016540 is an abundant number, since it is smaller than the sum of its proper divisors (13218236).

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

12016540 is a wasteful number, since it uses less digits than its factorization.

12016540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 600836 (or 600834 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 12016540 is about 3466.4881364286. The cubic root of 12016540 is about 229.0479867401.

Adding to 12016540 its reverse (4561021), we get a palindrome (16577561).

The spelling of 12016540 in words is "twelve million, sixteen thousand, five hundred forty".