12643263 has 16 divisors (see below), whose sum is σ = 18833760. Its totient is φ = 8382528.

The previous prime is 12643249. The next prime is 12643273. The reversal of 12643263 is 36234621.

12643263 is a `hidden beast` number, since 12 + 643 + 2 + 6 + 3 = 666.

It is not a de Polignac number, because 12643263 - 2¹⁶ = 12577727 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12643273) 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, 4131 + ... + 6507.

It is an arithmetic number, because the mean of its divisors is an integer number (1177110).

Almost surely, 2^12643263 is an apocalyptic number.

12643263 is a deficient number, since it is larger than the sum of its proper divisors (6190497).

12643263 is a wasteful number, since it uses less digits than its factorization.

12643263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2583 (or 2577 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 12643263 is about 3555.7366325418. The cubic root of 12643263 is about 232.9626997951.

Adding to 12643263 its reverse (36234621), we get a palindrome (48877884).

The spelling of 12643263 in words is "twelve million, six hundred forty-three thousand, two hundred sixty-three".