420212144 has 20 divisors (see below), whose sum is σ = 888176040. Its totient is φ = 191005440.

The previous prime is 420212131. The next prime is 420212159. The reversal of 420212144 is 441212024.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1193609 + ... + 1193960.

It is an arithmetic number, because the mean of its divisors is an integer number (44408802).

Almost surely, 2^420212144 is an apocalyptic number.

420212144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

420212144 is an abundant number, since it is smaller than the sum of its proper divisors (467963896).

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

420212144 is a wasteful number, since it uses less digits than its factorization.

420212144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2387588 (or 2387582 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 420212144 is about 20499.0766621329. The cubic root of 420212144 is about 749.0133063353.

Adding to 420212144 its reverse (441212024), we get a palindrome (861424168).

The spelling of 420212144 in words is "four hundred twenty million, two hundred twelve thousand, one hundred forty-four".