12540203 has 16 divisors (see below), whose sum is σ = 14424480. Its totient is φ = 10799616.

The previous prime is 12540181. The next prime is 12540217. The reversal of 12540203 is 30204521.

It is a cyclic number.

It is not a de Polignac number, because 12540203 - 2¹⁰ = 12539179 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (17).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12540263) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39401 + ... + 39717.

It is an arithmetic number, because the mean of its divisors is an integer number (901530).

Almost surely, 2^12540203 is an apocalyptic number.

12540203 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

12540203 is a deficient number, since it is larger than the sum of its proper divisors (1884277).

12540203 is a wasteful number, since it uses less digits than its factorization.

12540203 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 12540203 is about 3541.2149045208. The cubic root of 12540203 is about 232.3279831423.

Adding to 12540203 its reverse (30204521), we get a palindrome (42744724).

The spelling of 12540203 in words is "twelve million, five hundred forty thousand, two hundred three".