12840550 has 24 divisors (see below), whose sum is σ = 24246216. Its totient is φ = 5058240.

The previous prime is 12840547. The next prime is 12840551. The reversal of 12840550 is 5504821.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12840551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1434 + ... + 5266.

It is an arithmetic number, because the mean of its divisors is an integer number (1010259).

Almost surely, 2^12840550 is an apocalyptic number.

12840550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12840550 is a deficient number, since it is larger than the sum of its proper divisors (11405666).

12840550 is a wasteful number, since it uses less digits than its factorization.

12840550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3912 (or 3907 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 12840550 is about 3583.3713176281. The cubic root of 12840550 is about 234.1681772479.

The spelling of 12840550 in words is "twelve million, eight hundred forty thousand, five hundred fifty".