144857705 has 4 divisors (see below), whose sum is σ = 173829252. Its totient is φ = 115886160.

The previous prime is 144857693. The next prime is 144857711. The reversal of 144857705 is 507758441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 89340304 + 55517401 = 9452^2 + 7451^2 .

It is not a de Polignac number, because 144857705 - 2⁴ = 144857689 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14485766 + ... + 14485775.

It is an arithmetic number, because the mean of its divisors is an integer number (43457313).

Almost surely, 2^144857705 is an apocalyptic number.

It is an amenable number.

144857705 is a deficient number, since it is larger than the sum of its proper divisors (28971547).

144857705 is an equidigital number, since it uses as much as digits as its factorization.

144857705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28971546.

The product of its (nonzero) digits is 156800, while the sum is 41.

The square root of 144857705 is about 12035.6846502391. The cubic root of 144857705 is about 525.1868782935.

The spelling of 144857705 in words is "one hundred forty-four million, eight hundred fifty-seven thousand, seven hundred five".