1218245 has 8 divisors (see below), whose sum is σ = 1670784. Its totient is φ = 835344.

The previous prime is 1218221. The next prime is 1218247. The reversal of 1218245 is 5428121.

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 1218245 - 2⁸ = 1217989 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1218245.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1218247) 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, 17369 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (208848).

2^1218245 is an apocalyptic number.

It is an amenable number.

1218245 is a deficient number, since it is larger than the sum of its proper divisors (452539).

1218245 is an equidigital number, since it uses as much as digits as its factorization.

1218245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34819.

The product of its digits is 640, while the sum is 23.

The square root of 1218245 is about 1103.7413646321. The cubic root of 1218245 is about 106.8017115503.

The spelling of 1218245 in words is "one million, two hundred eighteen thousand, two hundred forty-five".