861223 has 8 divisors (see below), whose sum is σ = 956160. Its totient is φ = 769080.

The previous prime is 861221. The next prime is 861239. The reversal of 861223 is 322168.

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

It is a cyclic number.

It is not a de Polignac number, because 861223 - 2¹ = 861221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861194 and 861203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (861221) 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, 15 + ... + 1312.

It is an arithmetic number, because the mean of its divisors is an integer number (119520).

2⁸⁶¹²²³ is an apocalyptic number.

861223 is a deficient number, since it is larger than the sum of its proper divisors (94937).

861223 is a wasteful number, since it uses less digits than its factorization.

861223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1397.

The product of its digits is 576, while the sum is 22.

The square root of 861223 is about 928.0210126931. The cubic root of 861223 is about 95.1419116363.

The spelling of 861223 in words is "eight hundred sixty-one thousand, two hundred twenty-three".