12861018 has 28 divisors (see below), whose sum is σ = 28927338. Its totient is φ = 4286520.

The previous prime is 12860977. The next prime is 12861029. The reversal of 12861018 is 81016821.

12861018 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 10323369 + 2537649 = 3213^2 + 1593^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 12860982 and 12861000.

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 2953 + ... + 5868.

Almost surely, 2^12861018 is an apocalyptic number.

12861018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12861018 is an abundant number, since it is smaller than the sum of its proper divisors (16066320).

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

12861018 is an frugal number, since it uses more digits than its factorization.

12861018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841 (or 8826 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 12861018 is about 3586.2261501473. The cubic root of 12861018 is about 234.2925335470.

Adding to 12861018 its reverse (81016821), we get a palindrome (93877839).

It can be divided in two parts, 1286 and 1018, that added together give a square (2304 = 48²).

The spelling of 12861018 in words is "twelve million, eight hundred sixty-one thousand, eighteen".