869975 has 24 divisors (see below), whose sum is σ = 1205280. Its totient is φ = 619520.

The previous prime is 869959. The next prime is 869983. The reversal of 869975 is 579968.

It is not a de Polignac number, because 869975 - 2⁴ = 869959 is a prime.

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 23 ways as a sum of consecutive naturals, for example, 9731 + ... + 9819.

It is an arithmetic number, because the mean of its divisors is an integer number (50220).

2⁸⁶⁹⁹⁷⁵ is an apocalyptic number.

869975 is a gapful number since it is divisible by the number (85) formed by its first and last digit.

869975 is a deficient number, since it is larger than the sum of its proper divisors (335305).

869975 is a wasteful number, since it uses less digits than its factorization.

869975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139 (or 134 counting only the distinct ones).

The product of its digits is 136080, while the sum is 44.

The square root of 869975 is about 932.7245038059. The cubic root of 869975 is about 95.4631126785.

The spelling of 869975 in words is "eight hundred sixty-nine thousand, nine hundred seventy-five".