420321144 has 16 divisors (see below), whose sum is σ = 1050802920. Its totient is φ = 140107040.

The previous prime is 420321137. The next prime is 420321151. The reversal of 420321144 is 441123024.

It is an interprime number because it is at equal distance from previous prime (420321137) and next prime (420321151).

It is a self number, because there is not a number n which added to its sum of digits gives 420321144.

It is a congruent number.

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, 8756667 + ... + 8756714.

Almost surely, 2^420321144 is an apocalyptic number.

It is an amenable number.

420321144 is an abundant number, since it is smaller than the sum of its proper divisors (630481776).

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

420321144 is a wasteful number, since it uses less digits than its factorization.

420321144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17513390 (or 17513386 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 420321144 is about 20501.7351460797. The cubic root of 420321144 is about 749.0780636199.

Adding to 420321144 its reverse (441123024), we get a palindrome (861444168).

The spelling of 420321144 in words is "four hundred twenty million, three hundred twenty-one thousand, one hundred forty-four".