144581 has 4 divisors (see below), whose sum is σ = 145632. Its totient is φ = 143532.

The previous prime is 144577. The next prime is 144583. The reversal of 144581 is 185441.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 144581 - 2² = 144577 is a prime.

It is a super-2 number, since 2×144581² = 41807331122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 144581.

It is not an unprimeable number, because it can be changed into a prime (144583) 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, 281 + ... + 606.

It is an arithmetic number, because the mean of its divisors is an integer number (36408).

2¹⁴⁴⁵⁸¹ is an apocalyptic number.

It is an amenable number.

144581 is a deficient number, since it is larger than the sum of its proper divisors (1051).

144581 is an equidigital number, since it uses as much as digits as its factorization.

144581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1050.

The product of its digits is 640, while the sum is 23.

The square root of 144581 is about 380.2380833110. The cubic root of 144581 is about 52.4852263797.

The spelling of 144581 in words is "one hundred forty-four thousand, five hundred eighty-one".