321478 has 4 divisors (see below), whose sum is σ = 482220. Its totient is φ = 160738.

The previous prime is 321469. The next prime is 321509. The reversal of 321478 is 874123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874123 = 17 ⋅51419.

It is an alternating number because its digits alternate between odd and even.

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 as a sum of consecutive naturals, namely, 80368 + ... + 80371.

It is an arithmetic number, because the mean of its divisors is an integer number (120555).

2³²¹⁴⁷⁸ is an apocalyptic number.

321478 is a deficient number, since it is larger than the sum of its proper divisors (160742).

321478 is a wasteful number, since it uses less digits than its factorization.

321478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160741.

The product of its digits is 1344, while the sum is 25.

The square root of 321478 is about 566.9902997407. The cubic root of 321478 is about 68.5041821731.

The spelling of 321478 in words is "three hundred twenty-one thousand, four hundred seventy-eight".