421147 has 2 divisors, whose sum is σ = 421148. Its totient is φ = 421146.

The previous prime is 421133. The next prime is 421159. The reversal of 421147 is 741124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421147 - 2⁷ = 421019 is a prime.

It is not a weakly prime, because it can be changed into another prime (421177) 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, 210573 + 210574.

It is an arithmetic number, because the mean of its divisors is an integer number (210574).

2⁴²¹¹⁴⁷ is an apocalyptic number.

421147 is a deficient number, since it is larger than the sum of its proper divisors (1).

421147 is an equidigital number, since it uses as much as digits as its factorization.

421147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 224, while the sum is 19.

The square root of 421147 is about 648.9583962012. The cubic root of 421147 is about 74.9568344205.

The spelling of 421147 in words is "four hundred twenty-one thousand, one hundred forty-seven", and thus it is an iban number.