12706138 has 8 divisors (see below), whose sum is σ = 19289088. Its totient is φ = 6276444.

The previous prime is 12706093. The next prime is 12706139. The reversal of 12706138 is 83160721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×12706138² = 322891885750088, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12706139) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 38106 + ... + 38437.

It is an arithmetic number, because the mean of its divisors is an integer number (2411136).

Almost surely, 2^12706138 is an apocalyptic number.

12706138 is a deficient number, since it is larger than the sum of its proper divisors (6582950).

12706138 is an equidigital number, since it uses as much as digits as its factorization.

12706138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76628.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 12706138 is about 3564.5670143792. The cubic root of 12706138 is about 233.3482362363.

Adding to 12706138 its reverse (83160721), we get a palindrome (95866859).

The spelling of 12706138 in words is "twelve million, seven hundred six thousand, one hundred thirty-eight".