420210202 has 4 divisors (see below), whose sum is σ = 630315306. Its totient is φ = 210105100.

The previous prime is 420210187. The next prime is 420210223. The reversal of 420210202 is 202012024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 234733041 + 185477161 = 15321^2 + 13619^2 .

It is a super-2 number, since 2×420210202² = 353153227729761608, which contains 22 as substring.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105052549 + ... + 105052552.

Almost surely, 2^420210202 is an apocalyptic number.

420210202 is a deficient number, since it is larger than the sum of its proper divisors (210105104).

420210202 is a wasteful number, since it uses less digits than its factorization.

420210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210105103.

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 420210202 is about 20499.0292940910. The cubic root of 420210202 is about 749.0121524847.

Adding to 420210202 its reverse (202012024), we get a palindrome (622222226).

The spelling of 420210202 in words is "four hundred twenty million, two hundred ten thousand, two hundred two".