12138711 has 16 divisors (see below), whose sum is σ = 17495520. Its totient is φ = 7441920.

The previous prime is 12138703. The next prime is 12138713. The reversal of 12138711 is 11783121.

It is a happy number.

It is not a de Polignac number, because 12138711 - 2³ = 12138703 is a prime.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15571 + ... + 16331.

It is an arithmetic number, because the mean of its divisors is an integer number (1093470).

Almost surely, 2^12138711 is an apocalyptic number.

12138711 is a deficient number, since it is larger than the sum of its proper divisors (5356809).

12138711 is a wasteful number, since it uses less digits than its factorization.

12138711 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1186.

The product of its digits is 336, while the sum is 24.

The square root of 12138711 is about 3484.0652978955. The cubic root of 12138711 is about 229.8216071021.

The spelling of 12138711 in words is "twelve million, one hundred thirty-eight thousand, seven hundred eleven".