420423 has 8 divisors (see below), whose sum is σ = 563568. Its totient is φ = 278784.

The previous prime is 420421. The next prime is 420439. The reversal of 420423 is 324024.

It is a happy number.

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

It is not a de Polignac number, because 420423 - 2¹ = 420421 is a prime.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 420423.

It is not an unprimeable number, because it can be changed into a prime (420421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 861 + ... + 1257.

It is an arithmetic number, because the mean of its divisors is an integer number (70446).

2⁴²⁰⁴²³ is an apocalyptic number.

420423 is a deficient number, since it is larger than the sum of its proper divisors (143145).

420423 is a wasteful number, since it uses less digits than its factorization.

420423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753.

The product of its (nonzero) digits is 192, while the sum is 15.

The square root of 420423 is about 648.4003392966. The cubic root of 420423 is about 74.9138566511.

Adding to 420423 its reverse (324024), we get a palindrome (744447).

The spelling of 420423 in words is "four hundred twenty thousand, four hundred twenty-three", and thus it is an iban number.