1218396 has 12 divisors (see below), whose sum is σ = 2842952. Its totient is φ = 406128.

The previous prime is 1218391. The next prime is 1218401. The reversal of 1218396 is 6938121.

It is an interprime number because it is at equal distance from previous prime (1218391) and next prime (1218401).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50755 + ... + 50778.

2^1218396 is an apocalyptic number.

It is an amenable number.

1218396 is an abundant number, since it is smaller than the sum of its proper divisors (1624556).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1218396 is a wasteful number, since it uses less digits than its factorization.

1218396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101540 (or 101538 counting only the distinct ones).

The product of its digits is 2592, while the sum is 30.

The square root of 1218396 is about 1103.8097662188. The cubic root of 1218396 is about 106.8061240158.

The spelling of 1218396 in words is "one million, two hundred eighteen thousand, three hundred ninety-six".