1218856 has 16 divisors (see below), whose sum is σ = 2298240. Its totient is φ = 606000.

The previous prime is 1218853. The next prime is 1218859. The reversal of 1218856 is 6588121.

It is an interprime number because it is at equal distance from previous prime (1218853) and next prime (1218859).

It is not an unprimeable number, because it can be changed into a prime (1218853) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1705 + ... + 2311.

It is an arithmetic number, because the mean of its divisors is an integer number (143640).

2^1218856 is an apocalyptic number.

It is an amenable number.

1218856 is a deficient number, since it is larger than the sum of its proper divisors (1079384).

1218856 is a wasteful number, since it uses less digits than its factorization.

1218856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864 (or 860 counting only the distinct ones).

The product of its digits is 3840, while the sum is 31.

The square root of 1218856 is about 1104.0181157934. The cubic root of 1218856 is about 106.8195637173.

The spelling of 1218856 in words is "one million, two hundred eighteen thousand, eight hundred fifty-six".