1205223017 has 2 divisors, whose sum is σ = 1205223018. Its totient is φ = 1205223016.

The previous prime is 1205223013. The next prime is 1205223073. The reversal of 1205223017 is 7103225021.

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., 628454761 + 576768256 = 25069^2 + 24016^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205223017 - 2² = 1205223013 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1205222983 and 1205223001.

It is not a weakly prime, because it can be changed into another prime (1205223013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602611508 + 602611509.

It is an arithmetic number, because the mean of its divisors is an integer number (602611509).

Almost surely, 2^1205223017 is an apocalyptic number.

It is an amenable number.

1205223017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205223017 is an equidigital number, since it uses as much as digits as its factorization.

1205223017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 1205223017 is about 34716.3220546186. The cubic root of 1205223017 is about 1064.1980832449.

Adding to 1205223017 its reverse (7103225021), we get a palindrome (8308448038).

The spelling of 1205223017 in words is "one billion, two hundred five million, two hundred twenty-three thousand, seventeen".