12427538 has 4 divisors (see below), whose sum is σ = 18641310. Its totient is φ = 6213768.

The previous prime is 12427511. The next prime is 12427579. The reversal of 12427538 is 83572421.

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

It can be written as a sum of positive squares in only one way, i.e., 9628609 + 2798929 = 3103^2 + 1673^2 .

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, 3106883 + ... + 3106886.

Almost surely, 2^12427538 is an apocalyptic number.

12427538 is a deficient number, since it is larger than the sum of its proper divisors (6213772).

12427538 is an equidigital number, since it uses as much as digits as its factorization.

12427538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6213771.

The product of its digits is 13440, while the sum is 32.

The square root of 12427538 is about 3525.2713370746. The cubic root of 12427538 is about 231.6301205800.

Adding to 12427538 its reverse (83572421), we get a palindrome (95999959).

The spelling of 12427538 in words is "twelve million, four hundred twenty-seven thousand, five hundred thirty-eight".