144731285 has 8 divisors (see below), whose sum is σ = 183893976. Its totient is φ = 108974080.

The previous prime is 144731273. The next prime is 144731291. The reversal of 144731285 is 582137441.

It can be written as a sum of positive squares in 4 ways, for example, as 8145316 + 136585969 = 2854^2 + 11687^2 .

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

It is not a de Polignac number, because 144731285 - 2²⁰ = 143682709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 851276 + ... + 851445.

It is an arithmetic number, because the mean of its divisors is an integer number (22986747).

Almost surely, 2^144731285 is an apocalyptic number.

It is an amenable number.

144731285 is a deficient number, since it is larger than the sum of its proper divisors (39162691).

144731285 is a wasteful number, since it uses less digits than its factorization.

144731285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702743.

The product of its digits is 26880, while the sum is 35.

The square root of 144731285 is about 12030.4316215172. The cubic root of 144731285 is about 525.0340537246.

The spelling of 144731285 in words is "one hundred forty-four million, seven hundred thirty-one thousand, two hundred eighty-five".