420600042 has 12 divisors (see below), whose sum is σ = 911300130. Its totient is φ = 140200008.

The previous prime is 420600041. The next prime is 420600067. The reversal of 420600042 is 240006024.

420600042 is a `hidden beast` number, since 4 + 20 + 600 + 0 + 42 = 666.

It can be written as a sum of positive squares in only one way, i.e., 370601001 + 49999041 = 19251^2 + 7071^2 .

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: 23366669 = 420600042 / (4 + 2 + 0 + 6 + 0 + 0 + 0 + 4 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 420599988 and 420600024.

It is not an unprimeable number, because it can be changed into a prime (420600041) 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, 11683317 + ... + 11683352.

Almost surely, 2^420600042 is an apocalyptic number.

420600042 is an abundant number, since it is smaller than the sum of its proper divisors (490700088).

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

420600042 is a wasteful number, since it uses less digits than its factorization.

420600042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23366677 (or 23366674 counting only the distinct ones).

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

The square root of 420600042 is about 20508.5358326722. The cubic root of 420600042 is about 749.2437069508.

Adding to 420600042 its reverse (240006024), we get a palindrome (660606066).

The spelling of 420600042 in words is "four hundred twenty million, six hundred thousand, forty-two".