1223918 has 16 divisors (see below), whose sum is σ = 1902096. Its totient is φ = 590400.

The previous prime is 1223897. The next prime is 1223921. The reversal of 1223918 is 8193221.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12068 + ... + 12168.

It is an arithmetic number, because the mean of its divisors is an integer number (118881).

2^1223918 is an apocalyptic number.

1223918 is a deficient number, since it is larger than the sum of its proper divisors (678178).

1223918 is a wasteful number, since it uses less digits than its factorization.

1223918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259.

The product of its digits is 864, while the sum is 26.

The square root of 1223918 is about 1106.3082753012. The cubic root of 1223918 is about 106.9672360162.

The spelling of 1223918 in words is "one million, two hundred twenty-three thousand, nine hundred eighteen".