321875 has 12 divisors (see below), whose sum is σ = 406224. Its totient is φ = 255000.

The previous prime is 321851. The next prime is 321889. The reversal of 321875 is 578123.

It is not a de Polignac number, because 321875 - 2⁸ = 321619 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 14.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 321875.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3074 + ... + 3176.

It is an arithmetic number, because the mean of its divisors is an integer number (33852).

2³²¹⁸⁷⁵ is an apocalyptic number.

321875 is a deficient number, since it is larger than the sum of its proper divisors (84349).

321875 is an frugal number, since it uses more digits than its factorization.

321875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 108 counting only the distinct ones).

The product of its digits is 1680, while the sum is 26.

The square root of 321875 is about 567.3402858955. The cubic root of 321875 is about 68.5323696623.

Adding to 321875 its reverse (578123), we get a palindrome (899998).

It can be divided in two parts, 321 and 875, that multiplied together give a triangular number (280875 = T₇₄₉).

The spelling of 321875 in words is "three hundred twenty-one thousand, eight hundred seventy-five".