1218171 has 8 divisors (see below), whose sum is σ = 1629504. Its totient is φ = 809480.

The previous prime is 1218167. The next prime is 1218179. The reversal of 1218171 is 1718121.

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

It is a cyclic number.

It is not a de Polignac number, because 1218171 - 2² = 1218167 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218179) 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, 1060 + ... + 1886.

It is an arithmetic number, because the mean of its divisors is an integer number (203688).

2^1218171 is an apocalyptic number.

1218171 is a deficient number, since it is larger than the sum of its proper divisors (411333).

1218171 is an equidigital number, since it uses as much as digits as its factorization.

1218171 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1321.

The product of its digits is 112, while the sum is 21.

The square root of 1218171 is about 1103.7078417770. The cubic root of 1218171 is about 106.7995490169.

The spelling of 1218171 in words is "one million, two hundred eighteen thousand, one hundred seventy-one".