4144032421 has 12 divisors (see below), whose sum is σ = 4492248012. Its totient is φ = 3809533056.

The previous prime is 4144032419. The next prime is 4144032457. The reversal of 4144032421 is 1242304414.

4144032421 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1812204900 + 2331827521 = 42570^2 + 48289^2 .

It is not a de Polignac number, because 4144032421 - 2¹ = 4144032419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4144032481) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34486 + ... + 97351.

It is an arithmetic number, because the mean of its divisors is an integer number (374354001).

Almost surely, 2^4144032421 is an apocalyptic number.

It is an amenable number.

4144032421 is a deficient number, since it is larger than the sum of its proper divisors (348215591).

4144032421 is a wasteful number, since it uses less digits than its factorization.

4144032421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131940 (or 131897 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

The square root of 4144032421 is about 64374.1595750966. The cubic root of 4144032421 is about 1606.2299324639.

Adding to 4144032421 its reverse (1242304414), we get a palindrome (5386336835).

The spelling of 4144032421 in words is "four billion, one hundred forty-four million, thirty-two thousand, four hundred twenty-one".