1218884 has 12 divisors (see below), whose sum is σ = 2140908. Its totient is φ = 607200.

The previous prime is 1218859. The next prime is 1218901. The reversal of 1218884 is 4888121.

It can be written as a sum of positive squares in 2 ways, for example, as 688900 + 529984 = 830^2 + 728^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1218884.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1514 + ... + 2174.

It is an arithmetic number, because the mean of its divisors is an integer number (178409).

2^1218884 is an apocalyptic number.

It is an amenable number.

1218884 is a deficient number, since it is larger than the sum of its proper divisors (922024).

1218884 is a wasteful number, since it uses less digits than its factorization.

1218884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1126 (or 1124 counting only the distinct ones).

The product of its digits is 4096, while the sum is 32.

The square root of 1218884 is about 1104.0307966719. The cubic root of 1218884 is about 106.8203816769.

The spelling of 1218884 in words is "one million, two hundred eighteen thousand, eight hundred eighty-four".