1001285 has 4 divisors (see below), whose sum is σ = 1201548. Its totient is φ = 801024.

The previous prime is 1001279. The next prime is 1001291. The reversal of 1001285 is 5821001.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (1001279) and next prime (1001291).

It can be written as a sum of positive squares in 2 ways, for example, as 649636 + 351649 = 806^2 + 593^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1001285 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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, 100124 + ... + 100133.

It is an arithmetic number, because the mean of its divisors is an integer number (300387).

2^1001285 is an apocalyptic number.

It is an amenable number.

1001285 is a deficient number, since it is larger than the sum of its proper divisors (200263).

1001285 is an equidigital number, since it uses as much as digits as its factorization.

1001285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200262.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 1001285 is about 1000.6422937294. The cubic root of 1001285 is about 100.0428149995.

Adding to 1001285 its reverse (5821001), we get a palindrome (6822286).

The spelling of 1001285 in words is "one million, one thousand, two hundred eighty-five".