12138590 has 32 divisors (see below), whose sum is σ = 22900320. Its totient is φ = 4627584.

The previous prime is 12138589. The next prime is 12138593. The reversal of 12138590 is 9583121.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12138593) 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, 19301 + ... + 19919.

It is an arithmetic number, because the mean of its divisors is an integer number (715635).

Almost surely, 2^12138590 is an apocalyptic number.

12138590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12138590 is a deficient number, since it is larger than the sum of its proper divisors (10761730).

12138590 is a wasteful number, since it uses less digits than its factorization.

12138590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 716.

The product of its (nonzero) digits is 2160, while the sum is 29.

The square root of 12138590 is about 3484.0479330801. The cubic root of 12138590 is about 229.8208434706.

The spelling of 12138590 in words is "twelve million, one hundred thirty-eight thousand, five hundred ninety".