1223778 has 16 divisors (see below), whose sum is σ = 2489760. Its totient is φ = 400896.

The previous prime is 1223777. The next prime is 1223857. The reversal of 1223778 is 8773221.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (1223773) 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, 1375 + ... + 2082.

It is an arithmetic number, because the mean of its divisors is an integer number (155610).

2^1223778 is an apocalyptic number.

1223778 is an abundant number, since it is smaller than the sum of its proper divisors (1265982).

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

1223778 is a wasteful number, since it uses less digits than its factorization.

1223778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3521.

The product of its digits is 4704, while the sum is 30.

The square root of 1223778 is about 1106.2449999887. The cubic root of 1223778 is about 106.9631573159.

Adding to 1223778 its reverse (8773221), we get a palindrome (9996999).

The spelling of 1223778 in words is "one million, two hundred twenty-three thousand, seven hundred seventy-eight".