12778263 has 16 divisors (see below), whose sum is σ = 18991840. Its totient is φ = 8491392.

The previous prime is 12778253. The next prime is 12778277. The reversal of 12778263 is 36287721.

It is not a de Polignac number, because 12778263 - 2¹⁶ = 12712727 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12778253) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11145 + ... + 12237.

It is an arithmetic number, because the mean of its divisors is an integer number (1186990).

Almost surely, 2^12778263 is an apocalyptic number.

12778263 is a deficient number, since it is larger than the sum of its proper divisors (6213577).

12778263 is a wasteful number, since it uses less digits than its factorization.

12778263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1535 (or 1529 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 12778263 is about 3574.6696350852. The cubic root of 12778263 is about 233.7889286686.

It can be divided in two parts, 12778 and 263, that added together give a triangular number (13041 = T₁₆₁).

The spelling of 12778263 in words is "twelve million, seven hundred seventy-eight thousand, two hundred sixty-three".