421023 has 8 divisors (see below), whose sum is σ = 576688. Its totient is φ = 273024.

The previous prime is 421019. The next prime is 421033. The reversal of 421023 is 320124.

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

It is not a de Polignac number, because 421023 - 2² = 421019 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 (421033) 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, 1786 + ... + 2007.

It is an arithmetic number, because the mean of its divisors is an integer number (72086).

2⁴²¹⁰²³ is an apocalyptic number.

421023 is a deficient number, since it is larger than the sum of its proper divisors (155665).

421023 is a wasteful number, since it uses less digits than its factorization.

421023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3833.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 421023 is about 648.8628514563. The cubic root of 421023 is about 74.9494770846.

Adding to 421023 its reverse (320124), we get a palindrome (741147).

The spelling of 421023 in words is "four hundred twenty-one thousand, twenty-three", and thus it is an iban number.