12861311 has 8 divisors (see below), whose sum is σ = 13636224. Its totient is φ = 12108960.

The previous prime is 12861287. The next prime is 12861313. The reversal of 12861311 is 11316821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12861311 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 (12861313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4460 + ... + 6753.

It is an arithmetic number, because the mean of its divisors is an integer number (1704528).

Almost surely, 2^12861311 is an apocalyptic number.

12861311 is a deficient number, since it is larger than the sum of its proper divisors (774913).

12861311 is a wasteful number, since it uses less digits than its factorization.

12861311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11281.

The product of its digits is 288, while the sum is 23.

The square root of 12861311 is about 3586.2670006568. The cubic root of 12861311 is about 234.2943127528.

The spelling of 12861311 in words is "twelve million, eight hundred sixty-one thousand, three hundred eleven".