1220722 has 8 divisors (see below), whose sum is σ = 1838700. Its totient is φ = 607824.

The previous prime is 1220717. The next prime is 1220729. The reversal of 1220722 is 2270221.

It can be written as a sum of positive squares in 2 ways, for example, as 885481 + 335241 = 941^2 + 579^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1220696 and 1220705.

It is not an unprimeable number, because it can be changed into a prime (1220729) 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, 597 + ... + 1672.

2^1220722 is an apocalyptic number.

1220722 is a deficient number, since it is larger than the sum of its proper divisors (617978).

1220722 is a wasteful number, since it uses less digits than its factorization.

1220722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2540.

The product of its (nonzero) digits is 112, while the sum is 16.

The square root of 1220722 is about 1104.8628874209. The cubic root of 1220722 is about 106.8740475047.

Adding to 1220722 its reverse (2270221), we get a palindrome (3490943).

The spelling of 1220722 in words is "one million, two hundred twenty thousand, seven hundred twenty-two".