12851840 has 64 divisors (see below), whose sum is σ = 31505760. Its totient is φ = 5010432.

The previous prime is 12851837. The next prime is 12851849. The reversal of 12851840 is 4815821.

It is a tau number, because it is divible by the number of its divisors (64).

It is not an unprimeable number, because it can be changed into a prime (12851849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27287 + ... + 27753.

Almost surely, 2^12851840 is an apocalyptic number.

12851840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12851840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15752880).

12851840 is an abundant number, since it is smaller than the sum of its proper divisors (18653920).

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

12851840 is an equidigital number, since it uses as much as digits as its factorization.

12851840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 529 (or 517 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 29.

The square root of 12851840 is about 3584.9463036425. The cubic root of 12851840 is about 234.2367876076.

It can be divided in two parts, 1285 and 1840, that added together give a 5-th power (3125 = 5⁵).

The spelling of 12851840 in words is "twelve million, eight hundred fifty-one thousand, eight hundred forty".