12856140 has 144 divisors (see below), whose sum is σ = 43819776. Its totient is φ = 3024000.

The previous prime is 12856133. The next prime is 12856153. The reversal of 12856140 is 4165821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 85065 + ... + 85215.

It is an arithmetic number, because the mean of its divisors is an integer number (304304).

Almost surely, 2^12856140 is an apocalyptic number.

12856140 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 12856140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21909888).

12856140 is an abundant number, since it is smaller than the sum of its proper divisors (30963636).

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

12856140 is a wasteful number, since it uses less digits than its factorization.

12856140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 220 (or 215 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 12856140 is about 3585.5459835289. The cubic root of 12856140 is about 234.2629085334.

It can be divided in two parts, 12856 and 140, that added together give a square (12996 = 114²).

The spelling of 12856140 in words is "twelve million, eight hundred fifty-six thousand, one hundred forty".