421230042 has 12 divisors (see below), whose sum is σ = 912665130. Its totient is φ = 140410008.

The previous prime is 421230041. The next prime is 421230109. The reversal of 421230042 is 240032124.

It can be written as a sum of positive squares in only one way, i.e., 325405521 + 95824521 = 18039^2 + 9789^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 23401669 = 421230042 / (4 + 2 + 1 + 2 + 3 + 0 + 0 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 421229997 and 421230024.

It is not an unprimeable number, because it can be changed into a prime (421230041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11700817 + ... + 11700852.

Almost surely, 2^421230042 is an apocalyptic number.

421230042 is an abundant number, since it is smaller than the sum of its proper divisors (491435088).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

421230042 is a wasteful number, since it uses less digits than its factorization.

421230042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23401677 (or 23401674 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 421230042 is about 20523.8895436513. The cubic root of 421230042 is about 749.6176077347.

Adding to 421230042 its reverse (240032124), we get a palindrome (661262166).

The spelling of 421230042 in words is "four hundred twenty-one million, two hundred thirty thousand, forty-two".