420071 has 4 divisors (see below), whose sum is σ = 442200. Its totient is φ = 397944.

The previous prime is 420047. The next prime is 420073. The reversal of 420071 is 170024.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420071 - 2¹⁰ = 419047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420073) 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 in 3 ways as a sum of consecutive naturals, for example, 11036 + ... + 11073.

It is an arithmetic number, because the mean of its divisors is an integer number (110550).

2⁴²⁰⁰⁷¹ is an apocalyptic number.

420071 is a deficient number, since it is larger than the sum of its proper divisors (22129).

420071 is a wasteful number, since it uses less digits than its factorization.

420071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22128.

The product of its (nonzero) digits is 56, while the sum is 14.

The square root of 420071 is about 648.1288452152. The cubic root of 420071 is about 74.8929435546.

Adding to 420071 its reverse (170024), we get a palindrome (590095).

Subtracting from 420071 its reverse (170024), we obtain a cube (250047 = 63³).

The spelling of 420071 in words is "four hundred twenty thousand, seventy-one", and thus it is an iban number.