420420052 has 24 divisors (see below), whose sum is σ = 805325192. Its totient is φ = 190857600.

The previous prime is 420420043. The next prime is 420420053. The reversal of 420420052 is 250024024.

It can be written as a sum of positive squares in 4 ways, for example, as 1153476 + 419266576 = 1074^2 + 20476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420420053) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63099 + ... + 69442.

Almost surely, 2^420420052 is an apocalyptic number.

It is an amenable number.

420420052 is a deficient number, since it is larger than the sum of its proper divisors (384905140).

420420052 is a wasteful number, since it uses less digits than its factorization.

420420052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132619 (or 132617 counting only the distinct ones).

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

The square root of 420420052 is about 20504.1471902637. The cubic root of 420420052 is about 749.1368155238.

Adding to 420420052 its reverse (250024024), we get a palindrome (670444076).

The spelling of 420420052 in words is "four hundred twenty million, four hundred twenty thousand, fifty-two".