12040538 has 4 divisors (see below), whose sum is σ = 18060810. Its totient is φ = 6020268.

The previous prime is 12040537. The next prime is 12040571. The reversal of 12040538 is 83504021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83504021 = 29 ⋅2879449.

It can be written as a sum of positive squares in only one way, i.e., 12020089 + 20449 = 3467^2 + 143^2 .

It is not an unprimeable number, because it can be changed into a prime (12040531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3010133 + ... + 3010136.

Almost surely, 2^12040538 is an apocalyptic number.

12040538 is a deficient number, since it is larger than the sum of its proper divisors (6020272).

12040538 is an equidigital number, since it uses as much as digits as its factorization.

12040538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6020271.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 12040538 is about 3469.9478382247. The cubic root of 12040538 is about 229.2003611209.

Adding to 12040538 its reverse (83504021), we get a palindrome (95544559).

The spelling of 12040538 in words is "twelve million, forty thousand, five hundred thirty-eight".