1218867 has 8 divisors (see below), whose sum is σ = 1750224. Its totient is φ = 750048.

The previous prime is 1218859. The next prime is 1218901. The reversal of 1218867 is 7688121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1218867 - 2³ = 1218859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218167) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15588 + ... + 15665.

It is an arithmetic number, because the mean of its divisors is an integer number (218778).

2^1218867 is an apocalyptic number.

1218867 is a deficient number, since it is larger than the sum of its proper divisors (531357).

1218867 is a wasteful number, since it uses less digits than its factorization.

1218867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31269.

The product of its digits is 5376, while the sum is 33.

The square root of 1218867 is about 1104.0230975845. The cubic root of 1218867 is about 106.8198850600.

The spelling of 1218867 in words is "one million, two hundred eighteen thousand, eight hundred sixty-seven".