421233 has 4 divisors (see below), whose sum is σ = 561648. Its totient is φ = 280820.

The previous prime is 421207. The next prime is 421241. The reversal of 421233 is 332124.

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 421233 - 2⁸ = 420977 is a prime.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (421273) 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, 70203 + ... + 70208.

It is an arithmetic number, because the mean of its divisors is an integer number (140412).

2⁴²¹²³³ is an apocalyptic number.

It is an amenable number.

421233 is a deficient number, since it is larger than the sum of its proper divisors (140415).

421233 is a wasteful number, since it uses less digits than its factorization.

421233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140414.

The product of its digits is 144, while the sum is 15.

The square root of 421233 is about 649.0246528446. The cubic root of 421233 is about 74.9619362408.

Adding to 421233 its reverse (332124), we get a palindrome (753357).

It can be divided in two parts, 42 and 1233, that added together give a triangular number (1275 = T₅₀).

The spelling of 421233 in words is "four hundred twenty-one thousand, two hundred thirty-three".