1220706 has 24 divisors (see below), whose sum is σ = 2683980. Its totient is φ = 400896.

The previous prime is 1220699. The next prime is 1220711. The reversal of 1220706 is 6070221.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1121481 + 99225 = 1059^2 + 315^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 850 + ... + 1778.

2^1220706 is an apocalyptic number.

1220706 is an abundant number, since it is smaller than the sum of its proper divisors (1463274).

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

1220706 is a wasteful number, since it uses less digits than its factorization.

1220706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010 (or 1007 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 1220706 is about 1104.8556466797. The cubic root of 1220706 is about 106.8735805700.

Adding to 1220706 its reverse (6070221), we get a palindrome (7290927).

The spelling of 1220706 in words is "one million, two hundred twenty thousand, seven hundred six".