1223985 has 16 divisors (see below), whose sum is σ = 2238336. Its totient is φ = 559488.

The previous prime is 1223977. The next prime is 1223987. The reversal of 1223985 is 5893221.

It is a happy number.

It is not a de Polignac number, because 1223985 - 2³ = 1223977 is a prime.

It is an Ulam number.

It is a Curzon number.

It is a nialpdrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1223987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5724 + ... + 5933.

It is an arithmetic number, because the mean of its divisors is an integer number (139896).

2^1223985 is an apocalyptic number.

1223985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1223985 is a deficient number, since it is larger than the sum of its proper divisors (1014351).

1223985 is a wasteful number, since it uses less digits than its factorization.

1223985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11672.

The product of its digits is 4320, while the sum is 30.

The square root of 1223985 is about 1106.3385557776. The cubic root of 1223985 is about 106.9691878556.

The spelling of 1223985 in words is "one million, two hundred twenty-three thousand, nine hundred eighty-five".