12450138 has 8 divisors (see below), whose sum is σ = 24900288. Its totient is φ = 4150044.

The previous prime is 12450133. The next prime is 12450173. The reversal of 12450138 is 83105421.

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

12450138 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12450131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1037506 + ... + 1037517.

It is an arithmetic number, because the mean of its divisors is an integer number (3112536).

Almost surely, 2^12450138 is an apocalyptic number.

12450138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12450138 is a wasteful number, since it uses less digits than its factorization.

12450138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2075028.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 12450138 is about 3528.4753081182. The cubic root of 12450138 is about 231.7704452544.

Adding to 12450138 its reverse (83105421), we get a palindrome (95555559).

The spelling of 12450138 in words is "twelve million, four hundred fifty thousand, one hundred thirty-eight".