1306263 has 16 divisors (see below), whose sum is σ = 2108160. Its totient is φ = 702336.

The previous prime is 1306259. The next prime is 1306267. The reversal of 1306263 is 3626031.

It is an interprime number because it is at equal distance from previous prime (1306259) and next prime (1306267).

It is not a de Polignac number, because 1306263 - 2² = 1306259 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

1306263 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1306267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1473 + ... + 2186.

It is an arithmetic number, because the mean of its divisors is an integer number (131760).

2^1306263 is an apocalyptic number.

1306263 is a deficient number, since it is larger than the sum of its proper divisors (801897).

1306263 is a wasteful number, since it uses less digits than its factorization.

1306263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3686.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 1306263 is about 1142.9186322744. The cubic root of 1306263 is about 109.3142741002.

The spelling of 1306263 in words is "one million, three hundred six thousand, two hundred sixty-three".