1263563285 has 8 divisors (see below), whose sum is σ = 1516612920. Its totient is φ = 1010625984.

The previous prime is 1263563281. The next prime is 1263563303. The reversal of 1263563285 is 5823653621.

1263563285 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2390116 + 1261173169 = 1546^2 + 35513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1263563285 - 2² = 1263563281 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263563281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 950 + ... + 50279.

It is an arithmetic number, because the mean of its divisors is an integer number (189576615).

Almost surely, 2^1263563285 is an apocalyptic number.

It is an amenable number.

1263563285 is a deficient number, since it is larger than the sum of its proper divisors (253049635).

1263563285 is an equidigital number, since it uses as much as digits as its factorization.

1263563285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56167.

The product of its digits is 259200, while the sum is 41.

The square root of 1263563285 is about 35546.6353541372. The cubic root of 1263563285 is about 1081.0994989830.

The spelling of 1263563285 in words is "one billion, two hundred sixty-three million, five hundred sixty-three thousand, two hundred eighty-five".