420143420 has 12 divisors (see below), whose sum is σ = 882301224. Its totient is φ = 168057360.

The previous prime is 420143419. The next prime is 420143431. The reversal of 420143420 is 24341024.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 21007171 = 420143420 / (4 + 2 + 0 + 1 + 4 + 3 + 4 + 2 + 0).

It is a junction number, because it is equal to n+sod(n) for n = 420143392 and 420143401.

It is a congruent 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, 10503566 + ... + 10503605.

It is an arithmetic number, because the mean of its divisors is an integer number (73525102).

Almost surely, 2^420143420 is an apocalyptic number.

It is an amenable number.

420143420 is an abundant number, since it is smaller than the sum of its proper divisors (462157804).

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

420143420 is a wasteful number, since it uses less digits than its factorization.

420143420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21007180 (or 21007178 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 420143420 is about 20497.4003229678. The cubic root of 420143420 is about 748.9724714081.

Adding to 420143420 its reverse (24341024), we get a palindrome (444484444).

The spelling of 420143420 in words is "four hundred twenty million, one hundred forty-three thousand, four hundred twenty".