4205172145 has 8 divisors (see below), whose sum is σ = 5048807400. Its totient is φ = 3362403840.

The previous prime is 4205172089. The next prime is 4205172151. The reversal of 4205172145 is 5412715024.

It can be written as a sum of positive squares in 4 ways, for example, as 37307664 + 4167864481 = 6108^2 + 64559^2 .

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

It is not a de Polignac number, because 4205172145 - 2¹¹ = 4205170097 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206016 + ... + 225505.

It is an arithmetic number, because the mean of its divisors is an integer number (631100925).

Almost surely, 2^4205172145 is an apocalyptic number.

It is an amenable number.

4205172145 is a deficient number, since it is larger than the sum of its proper divisors (843635255).

4205172145 is a wasteful number, since it uses less digits than its factorization.

4205172145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 433475.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 4205172145 is about 64847.2986715715. The cubic root of 4205172145 is about 1614.0906669589.

Adding to 4205172145 its reverse (5412715024), we get a palindrome (9617887169).

The spelling of 4205172145 in words is "four billion, two hundred five million, one hundred seventy-two thousand, one hundred forty-five".