875009 has 4 divisors (see below), whose sum is σ = 879060. Its totient is φ = 870960.

The previous prime is 874987. The next prime is 875011. The reversal of 875009 is 900578.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 801025 + 73984 = 895^2 + 272^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-875009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (875089) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1682 + ... + 2139.

It is an arithmetic number, because the mean of its divisors is an integer number (219765).

2⁸⁷⁵⁰⁰⁹ is an apocalyptic number.

It is an amenable number.

875009 is a deficient number, since it is larger than the sum of its proper divisors (4051).

875009 is a wasteful number, since it uses less digits than its factorization.

875009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4050.

The product of its (nonzero) digits is 2520, while the sum is 29.

The square root of 875009 is about 935.4191573835. The cubic root of 875009 is about 95.6468870686.

The spelling of 875009 in words is "eight hundred seventy-five thousand, nine".