1263534101 has 2 divisors, whose sum is σ = 1263534102. Its totient is φ = 1263534100.

The previous prime is 1263534037. The next prime is 1263534113. The reversal of 1263534101 is 1014353621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1107159076 + 156375025 = 33274^2 + 12505^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263534101 - 2⁶ = 1263534037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1263534121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631767050 + 631767051.

It is an arithmetic number, because the mean of its divisors is an integer number (631767051).

Almost surely, 2^1263534101 is an apocalyptic number.

It is an amenable number.

1263534101 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263534101 is an equidigital number, since it uses as much as digits as its factorization.

1263534101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 1263534101 is about 35546.2248487797. The cubic root of 1263534101 is about 1081.0911756825.

Adding to 1263534101 its reverse (1014353621), we get a palindrome (2277887722).

The spelling of 1263534101 in words is "one billion, two hundred sixty-three million, five hundred thirty-four thousand, one hundred one".