420911 has 4 divisors (see below), whose sum is σ = 422472. Its totient is φ = 419352.

The previous prime is 420899. The next prime is 420919. The reversal of 420911 is 119024.

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 420911 - 2¹⁴ = 404527 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420919) 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, 260 + ... + 953.

It is an arithmetic number, because the mean of its divisors is an integer number (105618).

2⁴²⁰⁹¹¹ is an apocalyptic number.

420911 is a deficient number, since it is larger than the sum of its proper divisors (1561).

420911 is a wasteful number, since it uses less digits than its factorization.

420911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1560.

The product of its (nonzero) digits is 72, while the sum is 17.

The square root of 420911 is about 648.7765408829. The cubic root of 420911 is about 74.9428305071.

Adding to 420911 its reverse (119024), we get a palindrome (539935).

It can be divided in two parts, 420 and 911, that added together give a palindrome (1331).

The spelling of 420911 in words is "four hundred twenty thousand, nine hundred eleven".