12861005 has 16 divisors (see below), whose sum is σ = 16334400. Its totient is φ = 9694080.

The previous prime is 12860977. The next prime is 12861029. The reversal of 12861005 is 50016821.

12861005 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12861005 - 2¹⁴ = 12844621 is a prime.

It is a super-2 number, since 2×12861005² = 330810899220050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31241 + ... + 31649.

It is an arithmetic number, because the mean of its divisors is an integer number (1020900).

Almost surely, 2^12861005 is an apocalyptic number.

It is an amenable number.

12861005 is a deficient number, since it is larger than the sum of its proper divisors (3473395).

12861005 is a wasteful number, since it uses less digits than its factorization.

12861005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 12861005 is about 3586.2243376565. The cubic root of 12861005 is about 234.2924546055.

Adding to 12861005 its reverse (50016821), we get a palindrome (62877826).

The spelling of 12861005 in words is "twelve million, eight hundred sixty-one thousand, five".