1275809063 has 2 divisors, whose sum is σ = 1275809064. Its totient is φ = 1275809062.

The previous prime is 1275809053. The next prime is 1275809071. The reversal of 1275809063 is 3609085721.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1275809063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1275809063.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1275809023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 637904531 + 637904532.

It is an arithmetic number, because the mean of its divisors is an integer number (637904532).

Almost surely, 2^1275809063 is an apocalyptic number.

1275809063 is a deficient number, since it is larger than the sum of its proper divisors (1).

1275809063 is an equidigital number, since it uses as much as digits as its factorization.

1275809063 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 1275809063 is about 35718.4694940867. The cubic root of 1275809063 is about 1084.5807558613.

The spelling of 1275809063 in words is "one billion, two hundred seventy-five million, eight hundred nine thousand, sixty-three".