1222777 has 2 divisors, whose sum is σ = 1222778. Its totient is φ = 1222776.

The previous prime is 1222769. The next prime is 1222789. The reversal of 1222777 is 7772221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 881721 + 341056 = 939^2 + 584^2 .

It is an emirp because it is prime and its reverse (7772221) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1222777 - 2³ = 1222769 is a prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (1222717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611388 + 611389.

It is an arithmetic number, because the mean of its divisors is an integer number (611389).

2^1222777 is an apocalyptic number.

It is an amenable number.

1222777 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222777 is an equidigital number, since it uses as much as digits as its factorization.

1222777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2744, while the sum is 28.

The square root of 1222777 is about 1105.7924760099. The cubic root of 1222777 is about 106.9339855416.

Adding to 1222777 its reverse (7772221), we get a palindrome (8994998).

It can be divided in two parts, 1 and 222777, that added together give a triangular number (222778 = T₆₆₇).

The spelling of 1222777 in words is "one million, two hundred twenty-two thousand, seven hundred seventy-seven".