1218605 has 8 divisors (see below), whose sum is σ = 1469664. Its totient is φ = 970000.

The previous prime is 1218601. The next prime is 1218617. The reversal of 1218605 is 5068121.

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

It is not a de Polignac number, because 1218605 - 2² = 1218601 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218601) 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, 770 + ... + 1740.

It is an arithmetic number, because the mean of its divisors is an integer number (183708).

2^1218605 is an apocalyptic number.

It is an amenable number.

1218605 is a deficient number, since it is larger than the sum of its proper divisors (251059).

1218605 is an equidigital number, since it uses as much as digits as its factorization.

1218605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 1218605 is about 1103.9044342696. The cubic root of 1218605 is about 106.8122307342.

The spelling of 1218605 in words is "one million, two hundred eighteen thousand, six hundred five".