203540 has 12 divisors (see below), whose sum is σ = 427476. Its totient is φ = 81408.

The previous prime is 203531. The next prime is 203549. The reversal of 203540 is 45302.

It is an interprime number because it is at equal distance from previous prime (203531) and next prime (203549).

It can be written as a sum of positive squares in 2 ways, for example, as 103684 + 99856 = 322^2 + 316^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 203540.

It is not an unprimeable number, because it can be changed into a prime (203549) 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, 5069 + ... + 5108.

It is an arithmetic number, because the mean of its divisors is an integer number (35623).

2²⁰³⁵⁴⁰ is an apocalyptic number.

203540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

203540 is an abundant number, since it is smaller than the sum of its proper divisors (223936).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

203540 is a wasteful number, since it uses less digits than its factorization.

203540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10186 (or 10184 counting only the distinct ones).

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

The square root of 203540 is about 451.1540756770. The cubic root of 203540 is about 58.8233729408.

Adding to 203540 its reverse (45302), we get a palindrome (248842).

The spelling of 203540 in words is "two hundred three thousand, five hundred forty".