321422461 has 2 divisors, whose sum is σ = 321422462. Its totient is φ = 321422460.

The previous prime is 321422459. The next prime is 321422503. The reversal of 321422461 is 164224123.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 233906436 + 87516025 = 15294^2 + 9355^2 .

It is a cyclic number.

It is not a de Polignac number, because 321422461 - 2¹ = 321422459 is a prime.

Together with 321422459, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (321422261) 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 as a sum of consecutive naturals, namely, 160711230 + 160711231.

It is an arithmetic number, because the mean of its divisors is an integer number (160711231).

Almost surely, 2^321422461 is an apocalyptic number.

It is an amenable number.

321422461 is a deficient number, since it is larger than the sum of its proper divisors (1).

321422461 is an equidigital number, since it uses as much as digits as its factorization.

321422461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 25.

The square root of 321422461 is about 17928.2587274950. The cubic root of 321422461 is about 685.0023698570.

Adding to 321422461 its reverse (164224123), we get a palindrome (485646584).

The spelling of 321422461 in words is "three hundred twenty-one million, four hundred twenty-two thousand, four hundred sixty-one".