12138710 has 32 divisors (see below), whose sum is σ = 23094720. Its totient is φ = 4584448.

The previous prime is 12138703. The next prime is 12138713. The reversal of 12138710 is 1783121.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138713) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20174 + ... + 20766.

It is an arithmetic number, because the mean of its divisors is an integer number (721710).

Almost surely, 2^12138710 is an apocalyptic number.

12138710 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12138710 is a deficient number, since it is larger than the sum of its proper divisors (10956010).

12138710 is a wasteful number, since it uses less digits than its factorization.

12138710 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 712.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 12138710 is about 3484.0651543850. The cubic root of 12138710 is about 229.8216007911.

The spelling of 12138710 in words is "twelve million, one hundred thirty-eight thousand, seven hundred ten".