861123 has 8 divisors (see below), whose sum is σ = 1176336. Its totient is φ = 560000.

The previous prime is 861121. The next prime is 861131. The reversal of 861123 is 321168.

861123 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 861123 - 2¹ = 861121 is a prime.

It is a super-2 number, since 2×861123² = 1483065642258, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 861123.

It is not an unprimeable number, because it can be changed into a prime (861121) 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, 3378 + ... + 3623.

It is an arithmetic number, because the mean of its divisors is an integer number (147042).

2⁸⁶¹¹²³ is an apocalyptic number.

861123 is a deficient number, since it is larger than the sum of its proper divisors (315213).

861123 is a wasteful number, since it uses less digits than its factorization.

861123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7045.

The product of its digits is 288, while the sum is 21.

The square root of 861123 is about 927.9671330387. The cubic root of 861123 is about 95.1382290595.

The spelling of 861123 in words is "eight hundred sixty-one thousand, one hundred twenty-three".