12781026 has 24 divisors (see below), whose sum is σ = 27915264. Its totient is φ = 4226040.

The previous prime is 12781009. The next prime is 12781049. The reversal of 12781026 is 62018721.

It is a super-2 number, since 2×12781026² = 326709251225352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 510 + ... + 5081.

It is an arithmetic number, because the mean of its divisors is an integer number (1163136).

Almost surely, 2^12781026 is an apocalyptic number.

12781026 is an abundant number, since it is smaller than the sum of its proper divisors (15134238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12781026 is a wasteful number, since it uses less digits than its factorization.

12781026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5726 (or 5723 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The square root of 12781026 is about 3575.0560834762. The cubic root of 12781026 is about 233.8057779137.

Adding to 12781026 its reverse (62018721), we get a palindrome (74799747).

It can be divided in two parts, 1278 and 1026, that added together give a square (2304 = 48²).

The spelling of 12781026 in words is "twelve million, seven hundred eighty-one thousand, twenty-six".