1220718 has 16 divisors (see below), whose sum is σ = 2520576. Its totient is φ = 393720.

The previous prime is 1220717. The next prime is 1220729. The reversal of 1220718 is 8170221.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1220694 and 1220703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220711) 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, 3096 + ... + 3467.

It is an arithmetic number, because the mean of its divisors is an integer number (157536).

2^1220718 is an apocalyptic number.

1220718 is an abundant number, since it is smaller than the sum of its proper divisors (1299858).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1220718 is a wasteful number, since it uses less digits than its factorization.

1220718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599.

The product of its (nonzero) digits is 224, while the sum is 21.

The square root of 1220718 is about 1104.8610772400. The cubic root of 1220718 is about 106.8739307714.

Adding to 1220718 its reverse (8170221), we get a palindrome (9390939).

The spelling of 1220718 in words is "one million, two hundred twenty thousand, seven hundred eighteen".