144138441 has 4 divisors (see below), whose sum is σ = 192184592. Its totient is φ = 96092292.

The previous prime is 144138433. The next prime is 144138443. The reversal of 144138441 is 144831441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 144138441 - 2³ = 144138433 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 144138399 and 144138408.

It is not an unprimeable number, because it can be changed into a prime (144138443) 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, 24023071 + ... + 24023076.

It is an arithmetic number, because the mean of its divisors is an integer number (48046148).

Almost surely, 2^144138441 is an apocalyptic number.

It is an amenable number.

144138441 is a deficient number, since it is larger than the sum of its proper divisors (48046151).

144138441 is an equidigital number, since it uses as much as digits as its factorization.

144138441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48046150.

The product of its digits is 6144, while the sum is 30.

The square root of 144138441 is about 12005.7669892431. The cubic root of 144138441 is about 524.3161963653.

Adding to 144138441 its reverse (144831441), we get a palindrome (288969882).

The spelling of 144138441 in words is "one hundred forty-four million, one hundred thirty-eight thousand, four hundred forty-one".