12500138 has 16 divisors (see below), whose sum is σ = 22557120. Its totient is φ = 5075136.

The previous prime is 12500101. The next prime is 12500177. The reversal of 12500138 is 83100521.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23231 + ... + 23762.

It is an arithmetic number, because the mean of its divisors is an integer number (1409820).

Almost surely, 2^12500138 is an apocalyptic number.

12500138 is a deficient number, since it is larger than the sum of its proper divisors (10056982).

12500138 is a wasteful number, since it uses less digits than its factorization.

12500138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47021.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 12500138 is about 3535.5534220260. The cubic root of 12500138 is about 232.0802957298.

Adding to 12500138 its reverse (83100521), we get a palindrome (95600659).

The spelling of 12500138 in words is "twelve million, five hundred thousand, one hundred thirty-eight".