12501138 has 32 divisors (see below), whose sum is σ = 27066816. Its totient is φ = 3826368.

The previous prime is 12501067. The next prime is 12501169. The reversal of 12501138 is 83110521.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22581 + ... + 23127.

It is an arithmetic number, because the mean of its divisors is an integer number (845838).

Almost surely, 2^12501138 is an apocalyptic number.

12501138 is an abundant number, since it is smaller than the sum of its proper divisors (14565678).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12501138 is a wasteful number, since it uses less digits than its factorization.

12501138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 240, while the sum is 21.

The square root of 12501138 is about 3535.6948397734. The cubic root of 12501138 is about 232.0864843044.

Adding to 12501138 its reverse (83110521), we get a palindrome (95611659).

The spelling of 12501138 in words is "twelve million, five hundred one thousand, one hundred thirty-eight".