1218346 has 4 divisors (see below), whose sum is σ = 1827522. Its totient is φ = 609172.

The previous prime is 1218313. The next prime is 1218367. The reversal of 1218346 is 6438121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 6438121 = 17 ⋅378713.

It can be written as a sum of positive squares in only one way, i.e., 1199025 + 19321 = 1095^2 + 139^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1218346.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 304585 + ... + 304588.

2^1218346 is an apocalyptic number.

1218346 is a deficient number, since it is larger than the sum of its proper divisors (609176).

1218346 is an equidigital number, since it uses as much as digits as its factorization.

1218346 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609175.

The product of its digits is 1152, while the sum is 25.

The square root of 1218346 is about 1103.7871171562. The cubic root of 1218346 is about 106.8046629749.

The spelling of 1218346 in words is "one million, two hundred eighteen thousand, three hundred forty-six".