12778875 has 48 divisors (see below), whose sum is σ = 23735712. Its totient is φ = 6609600.

The previous prime is 12778873. The next prime is 12778933. The reversal of 12778875 is 57887721.

It is not a de Polignac number, because 12778875 - 2¹ = 12778873 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 12778875.

It is not an unprimeable number, because it can be changed into a prime (12778873) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 41472 + ... + 41778.

It is an arithmetic number, because the mean of its divisors is an integer number (494494).

Almost surely, 2^12778875 is an apocalyptic number.

12778875 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12778875 is a deficient number, since it is larger than the sum of its proper divisors (10956837).

12778875 is a wasteful number, since it uses less digits than its factorization.

12778875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365 (or 352 counting only the distinct ones).

The product of its digits is 219520, while the sum is 45.

The square root of 12778875 is about 3574.7552363763. The cubic root of 12778875 is about 233.7926609583.

The spelling of 12778875 in words is "twelve million, seven hundred seventy-eight thousand, eight hundred seventy-five".