1220947 has 8 divisors (see below), whose sum is σ = 1502816. Its totient is φ = 965952.

The previous prime is 1220927. The next prime is 1220953. The reversal of 1220947 is 7490221.

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

It is not a de Polignac number, because 1220947 - 2⁷ = 1220819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1220917) 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, 6618 + ... + 6799.

It is an arithmetic number, because the mean of its divisors is an integer number (187852).

2^1220947 is an apocalyptic number.

1220947 is a deficient number, since it is larger than the sum of its proper divisors (281869).

1220947 is a wasteful number, since it uses less digits than its factorization.

1220947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13437.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 1220947 is about 1104.9647053187. The cubic root of 1220947 is about 106.8806133413.

The spelling of 1220947 in words is "one million, two hundred twenty thousand, nine hundred forty-seven".