420771 has 8 divisors (see below), whose sum is σ = 604240. Its totient is φ = 258912.

The previous prime is 420769. The next prime is 420779. The reversal of 420771 is 177024.

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

It is not a de Polignac number, because 420771 - 2¹ = 420769 is a prime.

It is not an unprimeable number, because it can be changed into a prime (420779) 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 7 ways as a sum of consecutive naturals, for example, 5356 + ... + 5433.

It is an arithmetic number, because the mean of its divisors is an integer number (75530).

2⁴²⁰⁷⁷¹ is an apocalyptic number.

420771 is a deficient number, since it is larger than the sum of its proper divisors (183469).

420771 is a wasteful number, since it uses less digits than its factorization.

420771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10805.

The product of its (nonzero) digits is 392, while the sum is 21.

The square root of 420771 is about 648.6686365164. The cubic root of 420771 is about 74.9345206271.

Adding to 420771 its reverse (177024), we get a palindrome (597795).

It can be divided in two parts, 4207 and 71, that added together give a triangular number (4278 = T₉₂).

The spelling of 420771 in words is "four hundred twenty thousand, seven hundred seventy-one", and thus it is an iban number.