12632138 has 4 divisors (see below), whose sum is σ = 18948210. Its totient is φ = 6316068.

The previous prime is 12632117. The next prime is 12632149. The reversal of 12632138 is 83123621.

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., 6466849 + 6165289 = 2543^2 + 2483^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3158033 + ... + 3158036.

Almost surely, 2^12632138 is an apocalyptic number.

12632138 is a deficient number, since it is larger than the sum of its proper divisors (6316072).

12632138 is an equidigital number, since it uses as much as digits as its factorization.

12632138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6316071.

The product of its digits is 1728, while the sum is 26.

The square root of 12632138 is about 3554.1719148066. The cubic root of 12632138 is about 232.8943505995.

Adding to 12632138 its reverse (83123621), we get a palindrome (95755759).

The spelling of 12632138 in words is "twelve million, six hundred thirty-two thousand, one hundred thirty-eight".