1226001263 has 2 divisors, whose sum is σ = 1226001264. Its totient is φ = 1226001262.

The previous prime is 1226001221. The next prime is 1226001317. The reversal of 1226001263 is 3621006221.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1226001263 - 2⁶ = 1226001199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1226000263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 613000631 + 613000632.

It is an arithmetic number, because the mean of its divisors is an integer number (613000632).

Almost surely, 2^1226001263 is an apocalyptic number.

1226001263 is a deficient number, since it is larger than the sum of its proper divisors (1).

1226001263 is an equidigital number, since it uses as much as digits as its factorization.

1226001263 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 1226001263 is about 35014.3008355158. The cubic root of 1226001263 is about 1070.2789219578.

Adding to 1226001263 its reverse (3621006221), we get a palindrome (4847007484).

The spelling of 1226001263 in words is "one billion, two hundred twenty-six million, one thousand, two hundred sixty-three".