1218303 has 6 divisors (see below), whose sum is σ = 1759784. Its totient is φ = 812196.

The previous prime is 1218281. The next prime is 1218307. The reversal of 1218303 is 3038121.

It is not a de Polignac number, because 1218303 - 2¹⁴ = 1201919 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

1218303 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 67675 + ... + 67692.

2^1218303 is an apocalyptic number.

1218303 is a deficient number, since it is larger than the sum of its proper divisors (541481).

1218303 is a wasteful number, since it uses less digits than its factorization.

1218303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135373 (or 135370 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1218303 is about 1103.7676385907. The cubic root of 1218303 is about 106.8034064478.

It can be divided in two parts, 1218 and 303, that added together give a square (1521 = 39²).

The spelling of 1218303 in words is "one million, two hundred eighteen thousand, three hundred three".