321020342 has 4 divisors (see below), whose sum is σ = 481530516. Its totient is φ = 160510170.

The previous prime is 321020339. The next prime is 321020353. The reversal of 321020342 is 243020123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 243020123 = 163 ⋅1490921.

It is a self number, because there is not a number n which added to its sum of digits gives 321020342.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 80255084 + ... + 80255087.

It is an arithmetic number, because the mean of its divisors is an integer number (120382629).

Almost surely, 2^321020342 is an apocalyptic number.

321020342 is a deficient number, since it is larger than the sum of its proper divisors (160510174).

321020342 is a wasteful number, since it uses less digits than its factorization.

321020342 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160510173.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 321020342 is about 17917.0405480369. The cubic root of 321020342 is about 684.7165908065.

Adding to 321020342 its reverse (243020123), we get a palindrome (564040465).

The spelling of 321020342 in words is "three hundred twenty-one million, twenty thousand, three hundred forty-two".