1263221017 has 2 divisors, whose sum is σ = 1263221018. Its totient is φ = 1263221016.

The previous prime is 1263220993. The next prime is 1263221051. The reversal of 1263221017 is 7101223621.

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., 971631241 + 291589776 = 31171^2 + 17076^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263221017 - 2¹⁵ = 1263188249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1263220982 and 1263221000.

It is not a weakly prime, because it can be changed into another prime (1263221087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631610508 + 631610509.

It is an arithmetic number, because the mean of its divisors is an integer number (631610509).

Almost surely, 2^1263221017 is an apocalyptic number.

It is an amenable number.

1263221017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263221017 is an equidigital number, since it uses as much as digits as its factorization.

1263221017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1263221017 is about 35541.8206764932. The cubic root of 1263221017 is about 1081.0018758081.

Adding to 1263221017 its reverse (7101223621), we get a palindrome (8364444638).

The spelling of 1263221017 in words is "one billion, two hundred sixty-three million, two hundred twenty-one thousand, seventeen".