8422861 has 4 divisors (see below), whose sum is σ = 8429724. Its totient is φ = 8416000.

The previous prime is 8422859. The next prime is 8422867. The reversal of 8422861 is 1682248.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 7733961 + 688900 = 2781^2 + 830^2 .

It is a cyclic number.

It is not a de Polignac number, because 8422861 - 2¹ = 8422859 is a prime.

It is a Duffinian number.

8422861 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8422867) 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, 1030 + ... + 4231.

It is an arithmetic number, because the mean of its divisors is an integer number (2107431).

Almost surely, 2^8422861 is an apocalyptic number.

It is an amenable number.

8422861 is a deficient number, since it is larger than the sum of its proper divisors (6863).

8422861 is a wasteful number, since it uses less digits than its factorization.

8422861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6862.

The product of its digits is 6144, while the sum is 31.

The square root of 8422861 is about 2902.2165666952. The cubic root of 8422861 is about 203.4635157263.

The spelling of 8422861 in words is "eight million, four hundred twenty-two thousand, eight hundred sixty-one".