421044023 has 2 divisors, whose sum is σ = 421044024. Its totient is φ = 421044022.

The previous prime is 421044017. The next prime is 421044059. The reversal of 421044023 is 320440124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421044023 - 2⁴ = 421044007 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421043986 and 421044004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421044523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210522011 + 210522012.

It is an arithmetic number, because the mean of its divisors is an integer number (210522012).

Almost surely, 2^421044023 is an apocalyptic number.

421044023 is a deficient number, since it is larger than the sum of its proper divisors (1).

421044023 is an equidigital number, since it uses as much as digits as its factorization.

421044023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421044023 is about 20519.3572755094. The cubic root of 421044023 is about 749.5072455134.

Adding to 421044023 its reverse (320440124), we get a palindrome (741484147).

The spelling of 421044023 in words is "four hundred twenty-one million, forty-four thousand, twenty-three".