144405 has 12 divisors (see below), whose sum is σ = 250380. Its totient is φ = 76992.

The previous prime is 144383. The next prime is 144407. The reversal of 144405 is 504441.

It can be written as a sum of positive squares in 2 ways, for example, as 66564 + 77841 = 258^2 + 279^2 .

It is not a de Polignac number, because 144405 - 2⁶ = 144341 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1560 + ... + 1649.

It is an arithmetic number, because the mean of its divisors is an integer number (20865).

2¹⁴⁴⁴⁰⁵ is an apocalyptic number.

144405 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

144405 is a deficient number, since it is larger than the sum of its proper divisors (105975).

144405 is a wasteful number, since it uses less digits than its factorization.

144405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220 (or 3217 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 144405 is about 380.0065788904. The cubic root of 144405 is about 52.4639207894.

Adding to 144405 its reverse (504441), we get a palindrome (648846).

The spelling of 144405 in words is "one hundred forty-four thousand, four hundred five".