1218243 has 8 divisors (see below), whose sum is σ = 1749328. Its totient is φ = 749664.

The previous prime is 1218221. The next prime is 1218247. The reversal of 1218243 is 3428121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1218243 - 2⁵ = 1218211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218247) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15580 + ... + 15657.

It is an arithmetic number, because the mean of its divisors is an integer number (218666).

2^1218243 is an apocalyptic number.

1218243 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1218243 is a deficient number, since it is larger than the sum of its proper divisors (531085).

1218243 is a wasteful number, since it uses less digits than its factorization.

1218243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31253.

The product of its digits is 384, while the sum is 21.

The square root of 1218243 is about 1103.7404586224. The cubic root of 1218243 is about 106.8016531046.

The spelling of 1218243 in words is "one million, two hundred eighteen thousand, two hundred forty-three".