421143023 has 16 divisors (see below), whose sum is σ = 510163200. Its totient is φ = 339382656.

The previous prime is 421143013. The next prime is 421143031. The reversal of 421143023 is 320341124.

It is a cyclic number.

It is not a de Polignac number, because 421143023 - 2⁴ = 421143007 is a prime.

It is a super-2 number, since 2×421143023² = 354722891643157058, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 421142986 and 421143004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421143013) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201140 + ... + 203222.

It is an arithmetic number, because the mean of its divisors is an integer number (31885200).

Almost surely, 2^421143023 is an apocalyptic number.

421143023 is a deficient number, since it is larger than the sum of its proper divisors (89020177).

421143023 is a wasteful number, since it uses less digits than its factorization.

421143023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3806.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 421143023 is about 20521.7694899831. The cubic root of 421143023 is about 749.5659847413.

Adding to 421143023 its reverse (320341124), we get a palindrome (741484147).

The spelling of 421143023 in words is "four hundred twenty-one million, one hundred forty-three thousand, twenty-three".