1020089 has 8 divisors (see below), whose sum is σ = 1193280. Its totient is φ = 853776.

The previous prime is 1020079. The next prime is 1020101. The reversal of 1020089 is 9800201.

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

It is a de Polignac number, because none of the positive numbers 2^k-1020089 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 1020089.

It is not an unprimeable number, because it can be changed into a prime (1020049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1394 + ... + 1995.

It is an arithmetic number, because the mean of its divisors is an integer number (149160).

2^1020089 is an apocalyptic number.

It is an amenable number.

1020089 is a deficient number, since it is larger than the sum of its proper divisors (173191).

1020089 is an equidigital number, since it uses as much as digits as its factorization.

1020089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3439.

The product of its (nonzero) digits is 144, while the sum is 20.

The square root of 1020089 is about 1009.9945544408. The cubic root of 1020089 is about 100.6651986297.

The spelling of 1020089 in words is "one million, twenty thousand, eighty-nine".