1223866 has 32 divisors (see below), whose sum is σ = 2280960. Its totient is φ = 480816.

The previous prime is 1223863. The next prime is 1223867. The reversal of 1223866 is 6683221.

It is not an unprimeable number, because it can be changed into a prime (1223863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11385 + ... + 11491.

It is an arithmetic number, because the mean of its divisors is an integer number (71280).

2^1223866 is an apocalyptic number.

1223866 is a deficient number, since it is larger than the sum of its proper divisors (1057094).

1223866 is a wasteful number, since it uses less digits than its factorization.

1223866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178.

The product of its digits is 3456, while the sum is 28.

The square root of 1223866 is about 1106.2847734648. The cubic root of 1223866 is about 106.9657211067.

It can be divided in two parts, 12238 and 66, that multiplied together give a palindrome (807708).

The spelling of 1223866 in words is "one million, two hundred twenty-three thousand, eight hundred sixty-six".