144240421 has 8 divisors (see below), whose sum is σ = 155429120. Its totient is φ = 133065072.

The previous prime is 144240379. The next prime is 144240443. The reversal of 144240421 is 124042441.

144240421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 144240421 - 2¹⁵ = 144207653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144240392 and 144240401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144240451) 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, 41476 + ... + 44818.

It is an arithmetic number, because the mean of its divisors is an integer number (19428640).

Almost surely, 2^144240421 is an apocalyptic number.

It is an amenable number.

144240421 is a deficient number, since it is larger than the sum of its proper divisors (11188699).

144240421 is a wasteful number, since it uses less digits than its factorization.

144240421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6675.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 144240421 is about 12010.0133638560. The cubic root of 144240421 is about 524.4398209401.

Adding to 144240421 its reverse (124042441), we get a palindrome (268282862).

The spelling of 144240421 in words is "one hundred forty-four million, two hundred forty thousand, four hundred twenty-one".