144772105 has 4 divisors (see below), whose sum is σ = 173726532. Its totient is φ = 115817680.

The previous prime is 144772091. The next prime is 144772129. The reversal of 144772105 is 501277441.

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 83978896 + 60793209 = 9164^2 + 7797^2 .

It is not a de Polignac number, because 144772105 - 2¹⁵ = 144739337 is a prime.

It is a super-2 number, since 2×144772105² = 41917924772262050, which contains 22 as substring.

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, 14477206 + ... + 14477215.

It is an arithmetic number, because the mean of its divisors is an integer number (43431633).

Almost surely, 2^144772105 is an apocalyptic number.

It is an amenable number.

144772105 is a deficient number, since it is larger than the sum of its proper divisors (28954427).

144772105 is an equidigital number, since it uses as much as digits as its factorization.

144772105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28954426.

The product of its (nonzero) digits is 7840, while the sum is 31.

The square root of 144772105 is about 12032.1280328959. The cubic root of 144772105 is about 525.0834092722.

The spelling of 144772105 in words is "one hundred forty-four million, seven hundred seventy-two thousand, one hundred five".