144421243 has 4 divisors (see below), whose sum is σ = 146249440. Its totient is φ = 142593048.

The previous prime is 144421241. The next prime is 144421253. The reversal of 144421243 is 342124441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144421243 - 2¹ = 144421241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144421241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 913980 + ... + 914137.

It is an arithmetic number, because the mean of its divisors is an integer number (36562360).

Almost surely, 2^144421243 is an apocalyptic number.

144421243 is a deficient number, since it is larger than the sum of its proper divisors (1828197).

144421243 is an equidigital number, since it uses as much as digits as its factorization.

144421243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1828196.

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

The square root of 144421243 is about 12017.5389743491. The cubic root of 144421243 is about 524.6588780240.

Adding to 144421243 its reverse (342124441), we get a palindrome (486545684).

The spelling of 144421243 in words is "one hundred forty-four million, four hundred twenty-one thousand, two hundred forty-three".