1218286 has 4 divisors (see below), whose sum is σ = 1827432. Its totient is φ = 609142.

The previous prime is 1218281. The next prime is 1218307. The reversal of 1218286 is 6828121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6828121 = 97 ⋅70393.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304570 + ... + 304573.

It is an arithmetic number, because the mean of its divisors is an integer number (456858).

2^1218286 is an apocalyptic number.

1218286 is a deficient number, since it is larger than the sum of its proper divisors (609146).

1218286 is an equidigital number, since it uses as much as digits as its factorization.

1218286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609145.

The product of its digits is 1536, while the sum is 28.

The square root of 1218286 is about 1103.7599376676. The cubic root of 1218286 is about 106.8029096731.

The spelling of 1218286 in words is "one million, two hundred eighteen thousand, two hundred eighty-six".