42044143421 has 32 divisors (see below), whose sum is σ = 52402913280. Its totient is φ = 32956056000.

The previous prime is 42044143403. The next prime is 42044143423. The reversal of 42044143421 is 12434144024.

It is not a de Polignac number, because 42044143421 - 2¹⁸ = 42043881277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42044143423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 224696 + ... + 366846.

It is an arithmetic number, because the mean of its divisors is an integer number (1637591040).

Almost surely, 2^42044143421 is an apocalyptic number.

It is an amenable number.

42044143421 is a deficient number, since it is larger than the sum of its proper divisors (10358769859).

42044143421 is a wasteful number, since it uses less digits than its factorization.

42044143421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142265.

The product of its (nonzero) digits is 12288, while the sum is 29.

Adding to 42044143421 its reverse (12434144024), we get a palindrome (54478287445).

The spelling of 42044143421 in words is "forty-two billion, forty-four million, one hundred forty-three thousand, four hundred twenty-one".