1222718 has 8 divisors (see below), whose sum is σ = 2096112. Its totient is φ = 524016.

The previous prime is 1222717. The next prime is 1222723. The reversal of 1222718 is 8172221.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1222693 and 1222702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1222717) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43655 + ... + 43682.

It is an arithmetic number, because the mean of its divisors is an integer number (262014).

2^1222718 is an apocalyptic number.

1222718 is a deficient number, since it is larger than the sum of its proper divisors (873394).

1222718 is an equidigital number, since it uses as much as digits as its factorization.

1222718 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87346.

The product of its digits is 448, while the sum is 23.

The square root of 1222718 is about 1105.7657979880. The cubic root of 1222718 is about 106.9322656296.

Adding to 1222718 its reverse (8172221), we get a palindrome (9394939).

The spelling of 1222718 in words is "one million, two hundred twenty-two thousand, seven hundred eighteen".