144257 has 4 divisors (see below), whose sum is σ = 145236. Its totient is φ = 143280.

The previous prime is 144253. The next prime is 144259. The reversal of 144257 is 752441.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 752441 = 53 ⋅14197.

It can be written as a sum of positive squares in 2 ways, for example, as 25921 + 118336 = 161^2 + 344^2 .

It is a cyclic number.

It is not a de Polignac number, because 144257 - 2² = 144253 is a prime.

It is a super-4 number, since 4×144257⁴ (a number of 22 digits) contains 4444 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144253) 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 3 ways as a sum of consecutive naturals, for example, 218 + ... + 579.

It is an arithmetic number, because the mean of its divisors is an integer number (36309).

2¹⁴⁴²⁵⁷ is an apocalyptic number.

It is an amenable number.

144257 is a deficient number, since it is larger than the sum of its proper divisors (979).

144257 is an equidigital number, since it uses as much as digits as its factorization.

144257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978.

The product of its digits is 1120, while the sum is 23.

The square root of 144257 is about 379.8117954988. The cubic root of 144257 is about 52.4459913215.

Adding to 144257 its reverse (752441), we get a palindrome (896698).

The spelling of 144257 in words is "one hundred forty-four thousand, two hundred fifty-seven".