1263161201 has 2 divisors, whose sum is σ = 1263161202. Its totient is φ = 1263161200.

The previous prime is 1263161197. The next prime is 1263161227. The reversal of 1263161201 is 1021613621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1146499600 + 116661601 = 33860^2 + 10801^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263161201 - 2² = 1263161197 is a prime.

It is not a weakly prime, because it can be changed into another prime (1263161231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 631580600 + 631580601.

It is an arithmetic number, because the mean of its divisors is an integer number (631580601).

Almost surely, 2^1263161201 is an apocalyptic number.

It is an amenable number.

1263161201 is a deficient number, since it is larger than the sum of its proper divisors (1).

1263161201 is an equidigital number, since it uses as much as digits as its factorization.

1263161201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 1263161201 is about 35540.9791789703. The cubic root of 1263161201 is about 1080.9848130170.

Adding to 1263161201 its reverse (1021613621), we get a palindrome (2284774822).

The spelling of 1263161201 in words is "one billion, two hundred sixty-three million, one hundred sixty-one thousand, two hundred one".