1220618 has 8 divisors (see below), whose sum is σ = 2092512. Its totient is φ = 523116.

The previous prime is 1220599. The next prime is 1220623. The reversal of 1220618 is 8160221.

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

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220618.

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, 43580 + ... + 43607.

It is an arithmetic number, because the mean of its divisors is an integer number (261564).

2^1220618 is an apocalyptic number.

1220618 is a deficient number, since it is larger than the sum of its proper divisors (871894).

1220618 is an equidigital number, since it uses as much as digits as its factorization.

1220618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87196.

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 1220618 is about 1104.8158217549. The cubic root of 1220618 is about 106.8710123565.

Adding to 1220618 its reverse (8160221), we get a palindrome (9380839).

The spelling of 1220618 in words is "one million, two hundred twenty thousand, six hundred eighteen".