144869 has 4 divisors (see below), whose sum is σ = 145644. Its totient is φ = 144096.

The previous prime is 144847. The next prime is 144883. The reversal of 144869 is 968441.

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: 968441 = 229 ⋅4229.

It can be written as a sum of positive squares in 2 ways, for example, as 62500 + 82369 = 250^2 + 287^2 .

It is a cyclic number.

It is not a de Polignac number, because 144869 - 2¹² = 140773 is a prime.

It is a super-2 number, since 2×144869² = 41974054322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144829) 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, 89 + ... + 545.

It is an arithmetic number, because the mean of its divisors is an integer number (36411).

2¹⁴⁴⁸⁶⁹ is an apocalyptic number.

It is an amenable number.

144869 is a deficient number, since it is larger than the sum of its proper divisors (775).

144869 is an equidigital number, since it uses as much as digits as its factorization.

144869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774.

The product of its digits is 6912, while the sum is 32.

The square root of 144869 is about 380.6166049977. The cubic root of 144869 is about 52.5200528083.

The spelling of 144869 in words is "one hundred forty-four thousand, eight hundred sixty-nine".