420205242 has 8 divisors (see below), whose sum is σ = 840410496. Its totient is φ = 140068412.

The previous prime is 420205241. The next prime is 420205267. The reversal of 420205242 is 242502024.

It is a sphenic number, since it is the product of 3 distinct primes.

420205242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (420205241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35017098 + ... + 35017109.

It is an arithmetic number, because the mean of its divisors is an integer number (105051312).

Almost surely, 2^420205242 is an apocalyptic number.

420205242 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

420205242 is a wasteful number, since it uses less digits than its factorization.

420205242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70034212.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 420205242 is about 20498.9083123956. The cubic root of 420205242 is about 749.0092054557.

Adding to 420205242 its reverse (242502024), we get a palindrome (662707266).

The spelling of 420205242 in words is "four hundred twenty million, two hundred five thousand, two hundred forty-two".