420841 has 4 divisors (see below), whose sum is σ = 430672. Its totient is φ = 411012.

The previous prime is 420811. The next prime is 420851. The reversal of 420841 is 148024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 420841 - 2⁵ = 420809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4851 + ... + 4936.

It is an arithmetic number, because the mean of its divisors is an integer number (107668).

2⁴²⁰⁸⁴¹ is an apocalyptic number.

It is an amenable number.

420841 is a deficient number, since it is larger than the sum of its proper divisors (9831).

420841 is an equidigital number, since it uses as much as digits as its factorization.

420841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9830.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 420841 is about 648.7225909432. The cubic root of 420841 is about 74.9386757975.

Adding to 420841 its reverse (148024), we get a palindrome (568865).

It can be divided in two parts, 420 and 841, that multiplied together give a triangular number (353220 = T₈₄₀).

The spelling of 420841 in words is "four hundred twenty thousand, eight hundred forty-one".