144421157 has 8 divisors (see below), whose sum is σ = 149221632. Its totient is φ = 139629600.

The previous prime is 144421127. The next prime is 144421159. The reversal of 144421157 is 751124441.

It is a happy number.

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 144421157 - 2¹⁶ = 144355621 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 (144421159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51998 + ... + 54704.

It is an arithmetic number, because the mean of its divisors is an integer number (18652704).

Almost surely, 2^144421157 is an apocalyptic number.

It is an amenable number.

144421157 is a deficient number, since it is larger than the sum of its proper divisors (4800475).

144421157 is a wasteful number, since it uses less digits than its factorization.

144421157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4459.

The product of its digits is 4480, while the sum is 29.

The square root of 144421157 is about 12017.5353962449. The cubic root of 144421157 is about 524.6587738826.

Adding to 144421157 its reverse (751124441), we get a palindrome (895545598).

The spelling of 144421157 in words is "one hundred forty-four million, four hundred twenty-one thousand, one hundred fifty-seven".