1220089 has 8 divisors (see below), whose sum is σ = 1326080. Its totient is φ = 1115856.

The previous prime is 1220077. The next prime is 1220099. The reversal of 1220089 is 9800221.

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 1220089 - 2⁷ = 1219961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1220029) 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, 1282 + ... + 2020.

It is an arithmetic number, because the mean of its divisors is an integer number (165760).

2^1220089 is an apocalyptic number.

It is an amenable number.

1220089 is a deficient number, since it is larger than the sum of its proper divisors (105991).

1220089 is a wasteful number, since it uses less digits than its factorization.

1220089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 1220089 is about 1104.5763893910. The cubic root of 1220089 is about 106.8555712890.

The spelling of 1220089 in words is "one million, two hundred twenty thousand, eighty-nine".