1223684 has 48 divisors (see below), whose sum is σ = 2782080. Its totient is φ = 456960.

The previous prime is 1223683. The next prime is 1223687. The reversal of 1223684 is 4863221.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1223683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8864 + ... + 9000.

It is an arithmetic number, because the mean of its divisors is an integer number (57960).

2^1223684 is an apocalyptic number.

1223684 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223684, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1391040).

1223684 is an abundant number, since it is smaller than the sum of its proper divisors (1558396).

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

1223684 is a wasteful number, since it uses less digits than its factorization.

1223684 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 188 (or 186 counting only the distinct ones).

The product of its digits is 2304, while the sum is 26.

The square root of 1223684 is about 1106.2025131051. The cubic root of 1223684 is about 106.9604185855.

The spelling of 1223684 in words is "one million, two hundred twenty-three thousand, six hundred eighty-four".