1222257277 has 2 divisors, whose sum is σ = 1222257278. Its totient is φ = 1222257276.

The previous prime is 1222257263. The next prime is 1222257307. The reversal of 1222257277 is 7727522221.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 839898361 + 382358916 = 28981^2 + 19554^2 .

It is a cyclic number.

It is not a de Polignac number, because 1222257277 - 2¹⁹ = 1221732989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1222257247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 611128638 + 611128639.

It is an arithmetic number, because the mean of its divisors is an integer number (611128639).

Almost surely, 2^1222257277 is an apocalyptic number.

It is an amenable number.

1222257277 is a deficient number, since it is larger than the sum of its proper divisors (1).

1222257277 is an equidigital number, since it uses as much as digits as its factorization.

1222257277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54880, while the sum is 37.

The square root of 1222257277 is about 34960.7962866980. The cubic root of 1222257277 is about 1069.1883316648.

Adding to 1222257277 its reverse (7727522221), we get a palindrome (8949779498).

The spelling of 1222257277 in words is "one billion, two hundred twenty-two million, two hundred fifty-seven thousand, two hundred seventy-seven".