1002089 has 4 divisors (see below), whose sum is σ = 1093200. Its totient is φ = 910980.

The previous prime is 1002083. The next prime is 1002091. The reversal of 1002089 is 9802001.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 9802001 = 11 ⋅891091.

It is a cyclic number.

It is not a de Polignac number, because 1002089 - 2⁴ = 1002073 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 1002089.

It is not an unprimeable number, because it can be changed into a prime (1002083) 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 3 ways as a sum of consecutive naturals, for example, 45539 + ... + 45560.

It is an arithmetic number, because the mean of its divisors is an integer number (273300).

2^1002089 is an apocalyptic number.

It is an amenable number.

1002089 is a deficient number, since it is larger than the sum of its proper divisors (91111).

1002089 is an equidigital number, since it uses as much as digits as its factorization.

1002089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91110.

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

The square root of 1002089 is about 1001.0439550789. The cubic root of 1002089 is about 100.0695849015.

It can be divided in two parts, 10020 and 89, that multiplied together give a triangular number (891780 = T₁₃₃₅).

The spelling of 1002089 in words is "one million, two thousand, eighty-nine".