321201442 has 4 divisors (see below), whose sum is σ = 481802166. Its totient is φ = 160600720.

The previous prime is 321201409. The next prime is 321201449. The reversal of 321201442 is 244102123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 244102123 = 491 ⋅497153.

It can be written as a sum of positive squares in only one way, i.e., 207331201 + 113870241 = 14399^2 + 10671^2 .

It is not an unprimeable number, because it can be changed into a prime (321201449) by changing a digit.

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, 80300359 + ... + 80300362.

Almost surely, 2^321201442 is an apocalyptic number.

321201442 is a deficient number, since it is larger than the sum of its proper divisors (160600724).

321201442 is a wasteful number, since it uses less digits than its factorization.

321201442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160600723.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 321201442 is about 17922.0936834958. The cubic root of 321201442 is about 684.8453249785.

Adding to 321201442 its reverse (244102123), we get a palindrome (565303565).

The spelling of 321201442 in words is "three hundred twenty-one million, two hundred one thousand, four hundred forty-two".