144381 has 16 divisors (see below), whose sum is σ = 216000. Its totient is φ = 85248.

The previous prime is 144379. The next prime is 144383. The reversal of 144381 is 183441.

144381 = 78² + 79² + ... + 96².

It is an interprime number because it is at equal distance from previous prime (144379) and next prime (144383).

It is not a de Polignac number, because 144381 - 2¹ = 144379 is a prime.

It is a super-2 number, since 2×144381² = 41691746322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 895 + ... + 1043.

It is an arithmetic number, because the mean of its divisors is an integer number (13500).

2¹⁴⁴³⁸¹ is an apocalyptic number.

It is an amenable number.

144381 is a deficient number, since it is larger than the sum of its proper divisors (71619).

144381 is a wasteful number, since it uses less digits than its factorization.

144381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188.

The product of its digits is 384, while the sum is 21.

The square root of 144381 is about 379.9749991776. The cubic root of 144381 is about 52.4610141406.

Subtracting 144381 from its reverse (183441), we obtain a triangular number (39060 = T₂₇₉).

It can be divided in two parts, 144 and 381, that added together give a palindrome (525).

The spelling of 144381 in words is "one hundred forty-four thousand, three hundred eighty-one".