421023023 has 4 divisors (see below), whose sum is σ = 421076328. Its totient is φ = 420969720.

The previous prime is 421023017. The next prime is 421023041. The reversal of 421023023 is 320320124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-421023023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421022992 and 421023010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421023523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12188 + ... + 31473.

It is an arithmetic number, because the mean of its divisors is an integer number (105269082).

Almost surely, 2^421023023 is an apocalyptic number.

421023023 is a deficient number, since it is larger than the sum of its proper divisors (53305).

421023023 is an equidigital number, since it uses as much as digits as its factorization.

421023023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53304.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 421023023 is about 20518.8455571945. The cubic root of 421023023 is about 749.4947844935.

Adding to 421023023 its reverse (320320124), we get a palindrome (741343147).

The spelling of 421023023 in words is "four hundred twenty-one million, twenty-three thousand, twenty-three".