420202242 has 20 divisors (see below), whose sum is σ = 941564646. Its totient is φ = 140067360.

The previous prime is 420202217. The next prime is 420202247. The reversal of 420202242 is 242202024.

420202242 is a `hidden beast` number, since 420 + 2 + 0 + 2 + 242 = 666.

It can be written as a sum of positive squares in only one way, i.e., 247779081 + 172423161 = 15741^2 + 13131^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (420202247) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1296759 + ... + 1297082.

Almost surely, 2^420202242 is an apocalyptic number.

420202242 is an abundant number, since it is smaller than the sum of its proper divisors (521362404).

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

420202242 is a wasteful number, since it uses less digits than its factorization.

420202242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2593855 (or 2593846 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 420202242 is about 20498.8351376365. The cubic root of 420202242 is about 749.0074229673.

Adding to 420202242 its reverse (242202024), we get a palindrome (662404266).

The spelling of 420202242 in words is "four hundred twenty million, two hundred two thousand, two hundred forty-two".