861227 has 4 divisors (see below), whose sum is σ = 869856. Its totient is φ = 852600.

The previous prime is 861221. The next prime is 861239. The reversal of 861227 is 722168.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 861227 - 2⁶ = 861163 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 861196 and 861205.

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 3 ways as a sum of consecutive naturals, for example, 4163 + ... + 4364.

It is an arithmetic number, because the mean of its divisors is an integer number (217464).

2⁸⁶¹²²⁷ is an apocalyptic number.

861227 is a deficient number, since it is larger than the sum of its proper divisors (8629).

861227 is a wasteful number, since it uses less digits than its factorization.

861227 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8628.

The product of its digits is 1344, while the sum is 26.

The square root of 861227 is about 928.0231678143. The cubic root of 861227 is about 95.1420589334.

The spelling of 861227 in words is "eight hundred sixty-one thousand, two hundred twenty-seven".