421273 has 2 divisors, whose sum is σ = 421274. Its totient is φ = 421272.

The previous prime is 421241. The next prime is 421279. The reversal of 421273 is 372124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 419904 + 1369 = 648^2 + 37^2 .

It is a cyclic number.

It is not a de Polignac number, because 421273 - 2⁵ = 421241 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 421273.

It is not a weakly prime, because it can be changed into another prime (421279) 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, 210636 + 210637.

It is an arithmetic number, because the mean of its divisors is an integer number (210637).

2⁴²¹²⁷³ is an apocalyptic number.

It is an amenable number.

421273 is a deficient number, since it is larger than the sum of its proper divisors (1).

421273 is an equidigital number, since it uses as much as digits as its factorization.

421273 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 421273 is about 649.0554675835. The cubic root of 421273 is about 74.9643089439.

Adding to 421273 its reverse (372124), we get a palindrome (793397).

The spelling of 421273 in words is "four hundred twenty-one thousand, two hundred seventy-three", and thus it is an iban number.