861375 has 16 divisors (see below), whose sum is σ = 1433952. Its totient is φ = 459200.

The previous prime is 861361. The next prime is 861391. The reversal of 861375 is 573168.

It is not a de Polignac number, because 861375 - 2¹⁰ = 860351 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 774 + ... + 1523.

It is an arithmetic number, because the mean of its divisors is an integer number (89622).

2⁸⁶¹³⁷⁵ is an apocalyptic number.

861375 is a deficient number, since it is larger than the sum of its proper divisors (572577).

861375 is a wasteful number, since it uses less digits than its factorization.

861375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2315 (or 2305 counting only the distinct ones).

The product of its digits is 5040, while the sum is 30.

The square root of 861375 is about 928.1029037774. The cubic root of 861375 is about 95.1475086070.

The spelling of 861375 in words is "eight hundred sixty-one thousand, three hundred seventy-five".