1220047 has 8 divisors (see below), whose sum is σ = 1295600. Its totient is φ = 1145664.

The previous prime is 1220041. The next prime is 1220071. The reversal of 1220047 is 7400221.

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

It is a cyclic number.

It is not a de Polignac number, because 1220047 - 2⁷ = 1219919 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1220047.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1220041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2779 + ... + 3187.

It is an arithmetic number, because the mean of its divisors is an integer number (161950).

2^1220047 is an apocalyptic number.

1220047 is a deficient number, since it is larger than the sum of its proper divisors (75553).

1220047 is a wasteful number, since it uses less digits than its factorization.

1220047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585.

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

The square root of 1220047 is about 1104.5573774141. The cubic root of 1220047 is about 106.8543451529.

Adding to 1220047 its reverse (7400221), we get a palindrome (8620268).

The spelling of 1220047 in words is "one million, two hundred twenty thousand, forty-seven".