12778275 has 24 divisors (see below), whose sum is σ = 21230784. Its totient is φ = 6781600.

The previous prime is 12778253. The next prime is 12778277. The reversal of 12778275 is 57287721.

It is not a de Polignac number, because 12778275 - 2⁷ = 12778147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12778277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25780 + ... + 26270.

It is an arithmetic number, because the mean of its divisors is an integer number (884616).

Almost surely, 2^12778275 is an apocalyptic number.

12778275 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12778275 is a deficient number, since it is larger than the sum of its proper divisors (8452509).

12778275 is a wasteful number, since it uses less digits than its factorization.

12778275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 851 (or 846 counting only the distinct ones).

The product of its digits is 54880, while the sum is 39.

The square root of 12778275 is about 3574.6713135616. The cubic root of 12778275 is about 233.7890018519.

The spelling of 12778275 in words is "twelve million, seven hundred seventy-eight thousand, two hundred seventy-five".