203045 has 4 divisors (see below), whose sum is σ = 243660. Its totient is φ = 162432.

The previous prime is 203039. The next prime is 203051. The reversal of 203045 is 540302.

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

It is an interprime number because it is at equal distance from previous prime (203039) and next prime (203051).

It can be written as a sum of positive squares in 2 ways, for example, as 57121 + 145924 = 239^2 + 382^2 .

It is a cyclic number.

It is not a de Polignac number, because 203045 - 2⁶ = 202981 is a prime.

It is a congruent 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, 20300 + ... + 20309.

It is an arithmetic number, because the mean of its divisors is an integer number (60915).

2²⁰³⁰⁴⁵ is an apocalyptic number.

It is an amenable number.

203045 is a deficient number, since it is larger than the sum of its proper divisors (40615).

203045 is an equidigital number, since it uses as much as digits as its factorization.

203045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40614.

The product of its (nonzero) digits is 120, while the sum is 14.

The square root of 203045 is about 450.6051486612. The cubic root of 203045 is about 58.7756489786.

Adding to 203045 its reverse (540302), we get a palindrome (743347).

The spelling of 203045 in words is "two hundred three thousand, forty-five".