321497 has 6 divisors (see below), whose sum is σ = 353514. Its totient is φ = 292160.

The previous prime is 321469. The next prime is 321509. The reversal of 321497 is 794123.

It can be written as a sum of positive squares in only one way, i.e., 290521 + 30976 = 539^2 + 176^2 .

It is not a de Polignac number, because 321497 - 2¹⁴ = 305113 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (321427) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1208 + ... + 1449.

It is an arithmetic number, because the mean of its divisors is an integer number (58919).

321497 is a Friedman number, since it can be written as 9+(7*3^4)^2-1, using all its digits and the basic arithmetic operations.

2³²¹⁴⁹⁷ is an apocalyptic number.

It is an amenable number.

321497 is a deficient number, since it is larger than the sum of its proper divisors (32017).

321497 is a wasteful number, since it uses less digits than its factorization.

321497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2679 (or 2668 counting only the distinct ones).

The product of its digits is 1512, while the sum is 26.

The square root of 321497 is about 567.0070546298. The cubic root of 321497 is about 68.5055317251.

It can be divided in two parts, 321 and 497, that added together give a palindrome (818).

The spelling of 321497 in words is "three hundred twenty-one thousand, four hundred ninety-seven".