1222866 has 24 divisors (see below), whose sum is σ = 2715804. Its totient is φ = 397440.

The previous prime is 1222853. The next prime is 1222889. The reversal of 1222866 is 6682221.

It can be written as a sum of positive squares in 2 ways, for example, as 1058841 + 164025 = 1029^2 + 405^2 .

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 91 + ... + 1566.

2^1222866 is an apocalyptic number.

1222866 is an abundant number, since it is smaller than the sum of its proper divisors (1492938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1222866 is a wasteful number, since it uses less digits than its factorization.

1222866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1706 (or 1703 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 1222866 is about 1105.8327179099. The cubic root of 1222866 is about 106.9365798806.

The spelling of 1222866 in words is "one million, two hundred twenty-two thousand, eight hundred sixty-six".