12127538 has 4 divisors (see below), whose sum is σ = 18191310. Its totient is φ = 6063768.

The previous prime is 12127519. The next prime is 12127553. The reversal of 12127538 is 83572121.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83572121 = 8513 ⋅9817.

It can be written as a sum of positive squares in only one way, i.e., 10843849 + 1283689 = 3293^2 + 1133^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 12127538.

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 as a sum of consecutive naturals, namely, 3031883 + ... + 3031886.

Almost surely, 2^12127538 is an apocalyptic number.

12127538 is a deficient number, since it is larger than the sum of its proper divisors (6063772).

12127538 is an equidigital number, since it uses as much as digits as its factorization.

12127538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6063771.

The product of its digits is 3360, while the sum is 29.

The square root of 12127538 is about 3482.4614857885. The cubic root of 12127538 is about 229.7510728403.

Adding to 12127538 its reverse (83572121), we get a palindrome (95699659).

The spelling of 12127538 in words is "twelve million, one hundred twenty-seven thousand, five hundred thirty-eight".