1205334257 has 2 divisors, whose sum is σ = 1205334258. Its totient is φ = 1205334256.

The previous prime is 1205334241. The next prime is 1205334287. The reversal of 1205334257 is 7524335021.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1026817936 + 178516321 = 32044^2 + 13361^2 .

It is a cyclic number.

It is not a de Polignac number, because 1205334257 - 2⁴ = 1205334241 is a prime.

It is not a weakly prime, because it can be changed into another prime (1205334227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 602667128 + 602667129.

It is an arithmetic number, because the mean of its divisors is an integer number (602667129).

Almost surely, 2^1205334257 is an apocalyptic number.

It is an amenable number.

1205334257 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205334257 is an equidigital number, since it uses as much as digits as its factorization.

1205334257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 1205334257 is about 34717.9241458933. The cubic root of 1205334257 is about 1064.2308234519.

Adding to 1205334257 its reverse (7524335021), we get a palindrome (8729669278).

The spelling of 1205334257 in words is "one billion, two hundred five million, three hundred thirty-four thousand, two hundred fifty-seven".