12550005 has 32 divisors (see below), whose sum is σ = 24030720. Its totient is φ = 6177600.

The previous prime is 12550001. The next prime is 12550033. The reversal of 12550005 is 50005521.

It is not a de Polignac number, because 12550005 - 2² = 12550001 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 12550005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12550001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1821 + ... + 5330.

It is an arithmetic number, because the mean of its divisors is an integer number (750960).

Almost surely, 2^12550005 is an apocalyptic number.

12550005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12550005 is a deficient number, since it is larger than the sum of its proper divisors (11480715).

12550005 is a wasteful number, since it uses less digits than its factorization.

12550005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7178 (or 7172 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 12550005 is about 3542.5986224804. The cubic root of 12550005 is about 232.3885001266.

Adding to 12550005 its reverse (50005521), we get a palindrome (62555526).

The spelling of 12550005 in words is "twelve million, five hundred fifty thousand, five".