42421423 has 12 divisors (see below), whose sum is σ = 47830824. Its totient is φ = 37311600.

The previous prime is 42421411. The next prime is 42421459. The reversal of 42421423 is 32412424.

It is a happy number.

It is not a de Polignac number, because 42421423 - 2⁵ = 42421391 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42421394 and 42421403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42421493) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8565 + ... + 12577.

It is an arithmetic number, because the mean of its divisors is an integer number (3985902).

Almost surely, 2^42421423 is an apocalyptic number.

42421423 is a deficient number, since it is larger than the sum of its proper divisors (5409401).

42421423 is a wasteful number, since it uses less digits than its factorization.

42421423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086 (or 4055 counting only the distinct ones).

The product of its digits is 1536, while the sum is 22.

The square root of 42421423 is about 6513.1730362397. The cubic root of 42421423 is about 348.7613988044.

Adding to 42421423 its reverse (32412424), we get a palindrome (74833847).

It can be divided in two parts, 4242 and 1423, that added together give a palindrome (5665).

The spelling of 42421423 in words is "forty-two million, four hundred twenty-one thousand, four hundred twenty-three".