144286381 has 4 divisors (see below), whose sum is σ = 147356352. Its totient is φ = 141216412.

The previous prime is 144286379. The next prime is 144286393. The reversal of 144286381 is 183682441.

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 an emirpimes, since its reverse is a distinct semiprime: 183682441 = 3203 ⋅57347.

It is a cyclic number.

It is not a de Polignac number, because 144286381 - 2¹ = 144286379 is a prime.

It is a super-3 number, since 3×144286381³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144286381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144286321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1534915 + ... + 1535008.

It is an arithmetic number, because the mean of its divisors is an integer number (36839088).

Almost surely, 2^144286381 is an apocalyptic number.

It is an amenable number.

144286381 is a deficient number, since it is larger than the sum of its proper divisors (3069971).

144286381 is an equidigital number, since it uses as much as digits as its factorization.

144286381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3069970.

The product of its digits is 36864, while the sum is 37.

The square root of 144286381 is about 12011.9266148274. The cubic root of 144286381 is about 524.4955165961.

The spelling of 144286381 in words is "one hundred forty-four million, two hundred eighty-six thousand, three hundred eighty-one".