1263563 has 12 divisors (see below), whose sum is σ = 1489752. Its totient is φ = 1068480.

The previous prime is 1263547. The next prime is 1263569. The reversal of 1263563 is 3653621.

It is not a de Polignac number, because 1263563 - 2⁴ = 1263547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1263569) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5123 + ... + 5363.

It is an arithmetic number, because the mean of its divisors is an integer number (124146).

2^1263563 is an apocalyptic number.

1263563 is a deficient number, since it is larger than the sum of its proper divisors (226189).

1263563 is a wasteful number, since it uses less digits than its factorization.

1263563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 355 counting only the distinct ones).

The product of its digits is 3240, while the sum is 26.

The square root of 1263563 is about 1124.0831819754. The cubic root of 1263563 is about 108.1099417701.

The spelling of 1263563 in words is "one million, two hundred sixty-three thousand, five hundred sixty-three".