143172145 has 4 divisors (see below), whose sum is σ = 171806580. Its totient is φ = 114537712.

The previous prime is 143172143. The next prime is 143172179. The reversal of 143172145 is 541271341.

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 58384881 + 84787264 = 7641^2 + 9208^2 .

It is a cyclic number.

It is not a de Polignac number, because 143172145 - 2¹ = 143172143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (143172143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14317210 + ... + 14317219.

It is an arithmetic number, because the mean of its divisors is an integer number (42951645).

Almost surely, 2^143172145 is an apocalyptic number.

It is an amenable number.

143172145 is a deficient number, since it is larger than the sum of its proper divisors (28634435).

143172145 is an equidigital number, since it uses as much as digits as its factorization.

143172145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28634434.

The product of its digits is 3360, while the sum is 28.

The square root of 143172145 is about 11965.4563222637. The cubic root of 143172145 is about 523.1419062227.

The spelling of 143172145 in words is "one hundred forty-three million, one hundred seventy-two thousand, one hundred forty-five".