420943 has 4 divisors (see below), whose sum is σ = 422280. Its totient is φ = 419608.

The previous prime is 420941. The next prime is 420967. The reversal of 420943 is 349024.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 420943 - 2¹ = 420941 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 (420941) 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, 96 + ... + 922.

It is an arithmetic number, because the mean of its divisors is an integer number (105570).

2⁴²⁰⁹⁴³ is an apocalyptic number.

420943 is a deficient number, since it is larger than the sum of its proper divisors (1337).

420943 is an equidigital number, since it uses as much as digits as its factorization.

420943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1336.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 420943 is about 648.8012022184. The cubic root of 420943 is about 74.9447296496.

Adding to 420943 its reverse (349024), we get a palindrome (769967).

The spelling of 420943 in words is "four hundred twenty thousand, nine hundred forty-three".