420402052 has 12 divisors (see below), whose sum is σ = 840804160. Its totient is φ = 180172296.

The previous prime is 420402049. The next prime is 420402071. The reversal of 420402052 is 250204024.

420402052 is an admirable number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7507152 + ... + 7507207.

Almost surely, 2^420402052 is an apocalyptic number.

It is an amenable number.

420402052 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.

420402052 is a wasteful number, since it uses less digits than its factorization.

420402052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15014370 (or 15014368 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 420402052 is about 20503.7082499727. The cubic root of 420402052 is about 749.1261241093.

Adding to 420402052 its reverse (250204024), we get a palindrome (670606076).

The spelling of 420402052 in words is "four hundred twenty million, four hundred two thousand, fifty-two".