1318263 has 4 divisors (see below), whose sum is σ = 1757688. Its totient is φ = 878840.

The previous prime is 1318259. The next prime is 1318267. The reversal of 1318263 is 3628131.

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

It is an interprime number because it is at equal distance from previous prime (1318259) and next prime (1318267).

It is a cyclic number.

It is not a de Polignac number, because 1318263 - 2² = 1318259 is a prime.

It is a D-number.

1318263 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1318267) 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, 219708 + ... + 219713.

It is an arithmetic number, because the mean of its divisors is an integer number (439422).

2^1318263 is an apocalyptic number.

1318263 is a deficient number, since it is larger than the sum of its proper divisors (439425).

1318263 is an equidigital number, since it uses as much as digits as its factorization.

1318263 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439424.

The product of its digits is 864, while the sum is 24.

The square root of 1318263 is about 1148.1563482383. The cubic root of 1318263 is about 109.6479932154.

The spelling of 1318263 in words is "one million, three hundred eighteen thousand, two hundred sixty-three".