1263520057 has 2 divisors, whose sum is σ = 1263520058. Its totient is φ = 1263520056.

The previous prime is 1263520003. The next prime is 1263520109. The reversal of 1263520057 is 7500253621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1259114256 + 4405801 = 35484^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263520057 - 2²⁷ = 1129302329 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263524057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631760028 + 631760029.

It is an arithmetic number, because the mean of its divisors is an integer number (631760029).

Almost surely, 2^1263520057 is an apocalyptic number.

It is an amenable number.

1263520057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263520057 is an equidigital number, since it uses as much as digits as its factorization.

1263520057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 31.

The square root of 1263520057 is about 35546.0273026396. The cubic root of 1263520057 is about 1081.0871702766.

Adding to 1263520057 its reverse (7500253621), we get a palindrome (8763773678).

The spelling of 1263520057 in words is "one billion, two hundred sixty-three million, five hundred twenty thousand, fifty-seven".