421071 has 8 divisors (see below), whose sum is σ = 641664. Its totient is φ = 240600.

The previous prime is 421049. The next prime is 421079. The reversal of 421071 is 170124.

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

It is not a de Polignac number, because 421071 - 2¹⁰ = 420047 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 421071.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421079) 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, 10005 + ... + 10046.

It is an arithmetic number, because the mean of its divisors is an integer number (80208).

2⁴²¹⁰⁷¹ is an apocalyptic number.

421071 is a deficient number, since it is larger than the sum of its proper divisors (220593).

421071 is a wasteful number, since it uses less digits than its factorization.

421071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20061.

The product of its (nonzero) digits is 56, while the sum is 15.

The square root of 421071 is about 648.8998381877. The cubic root of 421071 is about 74.9523252569.

Adding to 421071 its reverse (170124), we get a palindrome (591195).

The spelling of 421071 in words is "four hundred twenty-one thousand, seventy-one", and thus it is an iban number.