12845778 has 48 divisors (see below), whose sum is σ = 29955744. Its totient is φ = 3629440.

The previous prime is 12845773. The next prime is 12845783. The reversal of 12845778 is 87754821.

It is an interprime number because it is at equal distance from previous prime (12845773) and next prime (12845783).

Its product of digits (125440) is a multiple of the sum of its prime divisors (140).

12845778 is a modest number, since divided by 5778 gives 1284 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12845773) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 120001 + ... + 120107.

It is an arithmetic number, because the mean of its divisors is an integer number (624078).

Almost surely, 2^12845778 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12845778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14977872).

12845778 is an abundant number, since it is smaller than the sum of its proper divisors (17109966).

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

12845778 is a wasteful number, since it uses less digits than its factorization.

12845778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247 (or 140 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 12845778 is about 3584.1007240311. The cubic root of 12845778 is about 234.1999532783.

The spelling of 12845778 in words is "twelve million, eight hundred forty-five thousand, seven hundred seventy-eight".