12840050 has 12 divisors (see below), whose sum is σ = 23882586. Its totient is φ = 5136000.

The previous prime is 12840031. The next prime is 12840089. The reversal of 12840050 is 5004821.

It can be written as a sum of positive squares in 3 ways, for example, as 7284601 + 5555449 = 2699^2 + 2357^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 128351 + ... + 128450.

Almost surely, 2^12840050 is an apocalyptic number.

12840050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12840050 is a deficient number, since it is larger than the sum of its proper divisors (11042536).

12840050 is a wasteful number, since it uses less digits than its factorization.

12840050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256813 (or 256808 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 12840050 is about 3583.3015502466. The cubic root of 12840050 is about 234.1651377725.

Adding to 12840050 its reverse (5004821), we get a palindrome (17844871).

The spelling of 12840050 in words is "twelve million, eight hundred forty thousand, fifty".