861333 has 16 divisors (see below), whose sum is σ = 1284096. Its totient is φ = 509040.

The previous prime is 861317. The next prime is 861347. The reversal of 861333 is 333168.

It is not a de Polignac number, because 861333 - 2⁴ = 861317 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861353) 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, 1116 + ... + 1722.

It is an arithmetic number, because the mean of its divisors is an integer number (80256).

2⁸⁶¹³³³ is an apocalyptic number.

It is an amenable number.

861333 is a deficient number, since it is larger than the sum of its proper divisors (422763).

861333 is a wasteful number, since it uses less digits than its factorization.

861333 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 664.

The product of its digits is 1296, while the sum is 24.

The square root of 861333 is about 928.0802767002. The cubic root of 861333 is about 95.1459621415.

It can be divided in two parts, 8613 and 33, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 861333 in words is "eight hundred sixty-one thousand, three hundred thirty-three".