321499 has 4 divisors (see below), whose sum is σ = 338440. Its totient is φ = 304560.

The previous prime is 321469. The next prime is 321509. The reversal of 321499 is 994123.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 994123 = 13 ⋅76471.

It is a cyclic number.

It is not a de Polignac number, because 321499 - 2⁵ = 321467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8442 + ... + 8479.

It is an arithmetic number, because the mean of its divisors is an integer number (84610).

2³²¹⁴⁹⁹ is an apocalyptic number.

321499 is a deficient number, since it is larger than the sum of its proper divisors (16941).

321499 is a wasteful number, since it uses less digits than its factorization.

321499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16940.

The product of its digits is 1944, while the sum is 28.

The square root of 321499 is about 567.0088182736. The cubic root of 321499 is about 68.5056737801.

It can be divided in two parts, 321 and 499, that added together give a triangular number (820 = T₄₀).

The spelling of 321499 in words is "three hundred twenty-one thousand, four hundred ninety-nine".