1005489 has 6 divisors (see below), whose sum is σ = 1452386. Its totient is φ = 670320.

The previous prime is 1005481. The next prime is 1005493. The reversal of 1005489 is 9845001.

It can be written as a sum of positive squares in only one way, i.e., 627264 + 378225 = 792^2 + 615^2 .

It is not a de Polignac number, because 1005489 - 2³ = 1005481 is a prime.

It is a super-2 number, since 2×1005489² = 2022016258242, which contains 22 as substring.

It is a Duffinian number.

1005489 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1005481) 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 5 ways as a sum of consecutive naturals, for example, 55852 + ... + 55869.

2^1005489 is an apocalyptic number.

It is an amenable number.

1005489 is a deficient number, since it is larger than the sum of its proper divisors (446897).

1005489 is a wasteful number, since it uses less digits than its factorization.

1005489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111727 (or 111724 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1005489 is about 1002.7407441607. The cubic root of 1005489 is about 100.1826329158.

The spelling of 1005489 in words is "one million, five thousand, four hundred eighty-nine".