12138759 has 12 divisors (see below), whose sum is σ = 17564352. Its totient is φ = 8078400.

The previous prime is 12138743. The next prime is 12138761. The reversal of 12138759 is 95783121.

12138759 is digitally balanced in base 2, base 3 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12138759 - 2⁴ = 12138743 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12131759) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8239 + ... + 9599.

It is an arithmetic number, because the mean of its divisors is an integer number (1463696).

Almost surely, 2^12138759 is an apocalyptic number.

12138759 is a deficient number, since it is larger than the sum of its proper divisors (5425593).

12138759 is a wasteful number, since it uses less digits than its factorization.

12138759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2355 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 12138759 is about 3484.0721863934. The cubic root of 12138759 is about 229.8219100289.

The spelling of 12138759 in words is "twelve million, one hundred thirty-eight thousand, seven hundred fifty-nine".