12138737 has 8 divisors (see below), whose sum is σ = 13351296. Its totient is φ = 10966032.

The previous prime is 12138727. The next prime is 12138743. The reversal of 12138737 is 73783121.

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

It is a cyclic number.

It is not a de Polignac number, because 12138737 - 2⁶ = 12138673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12138727) 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 7 ways as a sum of consecutive naturals, for example, 9323 + ... + 10544.

It is an arithmetic number, because the mean of its divisors is an integer number (1668912).

Almost surely, 2^12138737 is an apocalyptic number.

It is an amenable number.

12138737 is a deficient number, since it is larger than the sum of its proper divisors (1212559).

12138737 is a wasteful number, since it uses less digits than its factorization.

12138737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19927.

The product of its digits is 7056, while the sum is 32.

The square root of 12138737 is about 3484.0690291669. The cubic root of 12138737 is about 229.8217711875.

The spelling of 12138737 in words is "twelve million, one hundred thirty-eight thousand, seven hundred thirty-seven".