421545123 has 6 divisors (see below), whose sum is σ = 608898524. Its totient is φ = 281030076.

The previous prime is 421545119. The next prime is 421545133. The reversal of 421545123 is 321545124.

It is not a de Polignac number, because 421545123 - 2² = 421545119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421545133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 23419165 + ... + 23419182.

Almost surely, 2^421545123 is an apocalyptic number.

421545123 is a deficient number, since it is larger than the sum of its proper divisors (187353401).

421545123 is a wasteful number, since it uses less digits than its factorization.

421545123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46838353 (or 46838350 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 421545123 is about 20531.5640660910. The cubic root of 421545123 is about 749.8044663599.

Subtracting from 421545123 its reverse (321545124), we obtain a palindrome (99999999).

The spelling of 421545123 in words is "four hundred twenty-one million, five hundred forty-five thousand, one hundred twenty-three".