1000869 has 4 divisors (see below), whose sum is σ = 1334496. Its totient is φ = 667244.

The previous prime is 1000861. The next prime is 1000889. The reversal of 1000869 is 9680001.

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.

It is a cyclic number.

It is not a de Polignac number, because 1000869 - 2³ = 1000861 is a prime.

It is a super-2 number, since 2×1000869² = 2003477510322, which contains 22 as substring.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1000861) 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, 166809 + ... + 166814.

It is an arithmetic number, because the mean of its divisors is an integer number (333624).

2^1000869 is an apocalyptic number.

It is an amenable number.

1000869 is a deficient number, since it is larger than the sum of its proper divisors (333627).

1000869 is an equidigital number, since it uses as much as digits as its factorization.

1000869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333626.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 1000869 is about 1000.4344056459. The cubic root of 1000869 is about 100.0289582800.

The spelling of 1000869 in words is "one million, eight hundred sixty-nine", and thus it is an aban number.