1223777 has 2 divisors, whose sum is σ = 1223778. Its totient is φ = 1223776.

The previous prime is 1223773. The next prime is 1223857. The reversal of 1223777 is 7773221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1164241 + 59536 = 1079^2 + 244^2 .

It is a cyclic number.

It is not a de Polignac number, because 1223777 - 2² = 1223773 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1223773) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611888 + 611889.

It is an arithmetic number, because the mean of its divisors is an integer number (611889).

2^1223777 is an apocalyptic number.

It is an amenable number.

1223777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1223777 is an equidigital number, since it uses as much as digits as its factorization.

1223777 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4116, while the sum is 29.

The square root of 1223777 is about 1106.2445480092. The cubic root of 1223777 is about 106.9631281812.

Adding to 1223777 its reverse (7773221), we get a palindrome (8996998).

It can be divided in two parts, 12237 and 77, that multiplied together give a palindrome (942249).

The spelling of 1223777 in words is "one million, two hundred twenty-three thousand, seven hundred seventy-seven".