144133421 has 8 divisors (see below), whose sum is σ = 145671480. Its totient is φ = 142600192.

The previous prime is 144133417. The next prime is 144133441. The reversal of 144133421 is 124331441.

144133421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 972196 + 143161225 = 986^2 + 11965^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144133421 - 2² = 144133417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144133441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104291 + ... + 105663.

It is an arithmetic number, because the mean of its divisors is an integer number (18208935).

Almost surely, 2^144133421 is an apocalyptic number.

It is an amenable number.

144133421 is a deficient number, since it is larger than the sum of its proper divisors (1538059).

144133421 is a wasteful number, since it uses less digits than its factorization.

144133421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415.

The product of its digits is 1152, while the sum is 23.

The square root of 144133421 is about 12005.5579212297. The cubic root of 144133421 is about 524.3101093982.

Adding to 144133421 its reverse (124331441), we get a palindrome (268464862).

The spelling of 144133421 in words is "one hundred forty-four million, one hundred thirty-three thousand, four hundred twenty-one".