420415252 has 24 divisors (see below), whose sum is σ = 776978496. Its totient is φ = 198642048.

The previous prime is 420415243. The next prime is 420415267. The reversal of 420415252 is 252514024.

It is a super-2 number, since 2×420415252² = 353497968228447008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19893 + ... + 35164.

It is an arithmetic number, because the mean of its divisors is an integer number (32374104).

Almost surely, 2^420415252 is an apocalyptic number.

It is an amenable number.

420415252 is a deficient number, since it is larger than the sum of its proper divisors (356563244).

420415252 is a wasteful number, since it uses less digits than its factorization.

420415252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55167 (or 55165 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 420415252 is about 20504.0301404382. The cubic root of 420415252 is about 749.1339645098.

Adding to 420415252 its reverse (252514024), we get a palindrome (672929276).

The spelling of 420415252 in words is "four hundred twenty million, four hundred fifteen thousand, two hundred fifty-two".