1263326201 has 2 divisors, whose sum is σ = 1263326202. Its totient is φ = 1263326200.

The previous prime is 1263326191. The next prime is 1263326203. The reversal of 1263326201 is 1026233621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1223320576 + 40005625 = 34976^2 + 6325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263326201 - 2⁶ = 1263326137 is a prime.

Together with 1263326203, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1263326203) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631663100 + 631663101.

It is an arithmetic number, because the mean of its divisors is an integer number (631663101).

Almost surely, 2^1263326201 is an apocalyptic number.

It is an amenable number.

1263326201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263326201 is an equidigital number, since it uses as much as digits as its factorization.

1263326201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1263326201 is about 35543.3003672985. The cubic root of 1263326201 is about 1081.0318787250.

Adding to 1263326201 its reverse (1026233621), we get a palindrome (2289559822).

The spelling of 1263326201 in words is "one billion, two hundred sixty-three million, three hundred twenty-six thousand, two hundred one".