203142145 has 4 divisors (see below), whose sum is σ = 243770580. Its totient is φ = 162513712.

The previous prime is 203142119. The next prime is 203142151. The reversal of 203142145 is 541241302.

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 156575169 + 46566976 = 12513^2 + 6824^2 .

It is a cyclic number.

It is not a de Polignac number, because 203142145 - 2¹⁷ = 203011073 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 20314210 + ... + 20314219.

It is an arithmetic number, because the mean of its divisors is an integer number (60942645).

Almost surely, 2^203142145 is an apocalyptic number.

It is an amenable number.

203142145 is a deficient number, since it is larger than the sum of its proper divisors (40628435).

203142145 is an equidigital number, since it uses as much as digits as its factorization.

203142145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40628434.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 203142145 is about 14252.7942874371. The cubic root of 203142145 is about 587.8502103913.

Adding to 203142145 its reverse (541241302), we get a palindrome (744383447).

The spelling of 203142145 in words is "two hundred three million, one hundred forty-two thousand, one hundred forty-five".