1263533 has 4 divisors (see below), whose sum is σ = 1277820. Its totient is φ = 1249248.

The previous prime is 1263511. The next prime is 1263539. The reversal of 1263533 is 3353621.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 850084 + 413449 = 922^2 + 643^2 .

It is a cyclic number.

It is not a de Polignac number, because 1263533 - 2¹⁰ = 1262509 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 1263499 and 1263508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7010 + ... + 7187.

It is an arithmetic number, because the mean of its divisors is an integer number (319455).

2^1263533 is an apocalyptic number.

It is an amenable number.

1263533 is a deficient number, since it is larger than the sum of its proper divisors (14287).

1263533 is an equidigital number, since it uses as much as digits as its factorization.

1263533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14286.

The product of its digits is 1620, while the sum is 23.

The square root of 1263533 is about 1124.0698376880. The cubic root of 1263533 is about 108.1090861674.

The spelling of 1263533 in words is "one million, two hundred sixty-three thousand, five hundred thirty-three".