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144385 = 567431
BaseRepresentation
bin100011010000000001
321100001121
4203100001
514110020
63032241
71140643
oct432001
9240047
10144385
119952a
126b681
1350947
143a893
152cbaa
hex23401

144385 has 8 divisors (see below), whose sum is σ = 176256. Its totient is φ = 113520.

The previous prime is 144383. The next prime is 144407. The reversal of 144385 is 583441.

It can be divided in two parts, 144 and 385, that added together give a square (529 = 232).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 144385 - 21 = 144383 is a prime.

It is a Duffinian number.

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

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120 + ... + 550.

It is an arithmetic number, because the mean of its divisors is an integer number (22032).

It is a Proth number, since it is equal to 141 ⋅ 210 + 1 and 141 < 210.

2144385 is an apocalyptic number.

It is an amenable number.

144385 is a deficient number, since it is larger than the sum of its proper divisors (31871).

144385 is an equidigital number, since it uses as much as digits as its factorization.

144385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 503.

The product of its digits is 1920, while the sum is 25.

The square root of 144385 is about 379.9802626453. The cubic root of 144385 is about 52.4614986045.

The spelling of 144385 in words is "one hundred forty-four thousand, three hundred eighty-five".

Divisors: 1 5 67 335 431 2155 28877 144385