421771 has 8 divisors (see below), whose sum is σ = 488160. Its totient is φ = 356928.

The previous prime is 421741. The next prime is 421783. The reversal of 421771 is 177124.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 421771 - 2⁵ = 421739 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421711) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 285 + ... + 961.

It is an arithmetic number, because the mean of its divisors is an integer number (61020).

2⁴²¹⁷⁷¹ is an apocalyptic number.

421771 is a deficient number, since it is larger than the sum of its proper divisors (66389).

421771 is an equidigital number, since it uses as much as digits as its factorization.

421771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773.

The product of its digits is 392, while the sum is 22.

The square root of 421771 is about 649.4389886664. The cubic root of 421771 is about 74.9938365305.

Adding to 421771 its reverse (177124), we get a palindrome (598895).

The spelling of 421771 in words is "four hundred twenty-one thousand, seven hundred seventy-one", and thus it is an iban number.