1223418 has 16 divisors (see below), whose sum is σ = 2796480. Its totient is φ = 349536.

The previous prime is 1223381. The next prime is 1223419. The reversal of 1223418 is 8143221.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 1223394 and 1223403.

It is not an unprimeable number, because it can be changed into a prime (1223419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14523 + ... + 14606.

It is an arithmetic number, because the mean of its divisors is an integer number (174780).

2^1223418 is an apocalyptic number.

1223418 is an abundant number, since it is smaller than the sum of its proper divisors (1573062).

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

1223418 is a wasteful number, since it uses less digits than its factorization.

1223418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29141.

The product of its digits is 384, while the sum is 21.

The square root of 1223418 is about 1106.0822754208. The cubic root of 1223418 is about 106.9526678009.

Adding to 1223418 its reverse (8143221), we get a palindrome (9366639).

The spelling of 1223418 in words is "one million, two hundred twenty-three thousand, four hundred eighteen".