12778273 has 4 divisors (see below), whose sum is σ = 12849840. Its totient is φ = 12706708.

The previous prime is 12778253. The next prime is 12778277. The reversal of 12778273 is 37287721.

12778273 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37287721 = 1613 ⋅23117.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12778273 is a prime.

It is a Duffinian number.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35515 + ... + 35872.

It is an arithmetic number, because the mean of its divisors is an integer number (3212460).

Almost surely, 2^12778273 is an apocalyptic number.

It is an amenable number.

12778273 is a deficient number, since it is larger than the sum of its proper divisors (71567).

12778273 is an equidigital number, since it uses as much as digits as its factorization.

12778273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71566.

The product of its digits is 32928, while the sum is 37.

The square root of 12778273 is about 3574.6710338156. The cubic root of 12778273 is about 233.7889896546.

It can be divided in two parts, 127 and 78273, that added together give a square (78400 = 280²).

The spelling of 12778273 in words is "twelve million, seven hundred seventy-eight thousand, two hundred seventy-three".