421144144 has 20 divisors (see below), whose sum is σ = 824048820. Its totient is φ = 208486400.

The previous prime is 421144123. The next prime is 421144147. The reversal of 421144144 is 441441124.

It can be written as a sum of positive squares in 2 ways, for example, as 383689744 + 37454400 = 19588^2 + 6120^2 .

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421144147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128689 + ... + 131920.

It is an arithmetic number, because the mean of its divisors is an integer number (41202441).

Almost surely, 2^421144144 is an apocalyptic number.

It is an amenable number.

421144144 is a deficient number, since it is larger than the sum of its proper divisors (402904676).

421144144 is a wasteful number, since it uses less digits than its factorization.

421144144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260718 (or 260712 counting only the distinct ones).

The product of its digits is 2048, while the sum is 25.

The square root of 421144144 is about 20521.7968024245. The cubic root of 421144144 is about 749.5666498065.

Adding to 421144144 its reverse (441441124), we get a palindrome (862585268).

The spelling of 421144144 in words is "four hundred twenty-one million, one hundred forty-four thousand, one hundred forty-four".