1318243 has 4 divisors (see below), whose sum is σ = 1323280. Its totient is φ = 1313208.

The previous prime is 1318241. The next prime is 1318249. The reversal of 1318243 is 3428131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3428131 = 7 ⋅489733.

It is a cyclic number.

It is not a de Polignac number, because 1318243 - 2¹ = 1318241 is a prime.

It is a Duffinian number.

1318243 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1318241) 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, 2103 + ... + 2656.

It is an arithmetic number, because the mean of its divisors is an integer number (330820).

2^1318243 is an apocalyptic number.

1318243 is a deficient number, since it is larger than the sum of its proper divisors (5037).

1318243 is an equidigital number, since it uses as much as digits as its factorization.

1318243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5036.

The product of its digits is 576, while the sum is 22.

The square root of 1318243 is about 1148.1476385901. The cubic root of 1318243 is about 109.6474387052.

It can be divided in two parts, 13182 and 43, that added together give a square (13225 = 115²).

The spelling of 1318243 in words is "one million, three hundred eighteen thousand, two hundred forty-three".