144021375 has 64 divisors (see below), whose sum is σ = 269068800. Its totient is φ = 76010400.

The previous prime is 144021347. The next prime is 144021379. The reversal of 144021375 is 573120441.

144021375 is a `hidden beast` number, since 1 + 440 + 213 + 7 + 5 = 666.

It is not a de Polignac number, because 144021375 - 2¹⁹ = 143497087 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144021379) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 468972 + ... + 469278.

It is an arithmetic number, because the mean of its divisors is an integer number (4204200).

Almost surely, 2^144021375 is an apocalyptic number.

144021375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

144021375 is a deficient number, since it is larger than the sum of its proper divisors (125047425).

144021375 is a wasteful number, since it uses less digits than its factorization.

144021375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470 (or 454 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 144021375 is about 12000.8905919519. The cubic root of 144021375 is about 524.1742119787.

The spelling of 144021375 in words is "one hundred forty-four million, twenty-one thousand, three hundred seventy-five".