321427 has 2 divisors, whose sum is σ = 321428. Its totient is φ = 321426.

The previous prime is 321413. The next prime is 321443. The reversal of 321427 is 724123.

It is a weak prime.

It is an emirp because it is prime and its reverse (724123) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-321427 is a prime.

It is not a weakly prime, because it can be changed into another prime (321467) 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, 160713 + 160714.

It is an arithmetic number, because the mean of its divisors is an integer number (160714).

2³²¹⁴²⁷ is an apocalyptic number.

321427 is a deficient number, since it is larger than the sum of its proper divisors (1).

321427 is an equidigital number, since it uses as much as digits as its factorization.

321427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 19.

The square root of 321427 is about 566.9453236424. The cubic root of 321427 is about 68.5005594285.

The spelling of 321427 in words is "three hundred twenty-one thousand, four hundred twenty-seven", and thus it is an iban number.