12550805 has 8 divisors (see below), whose sum is σ = 15199800. Its totient is φ = 9948096.

The previous prime is 12550799. The next prime is 12550819. The reversal of 12550805 is 50805521.

It can be written as a sum of positive squares in 4 ways, for example, as 4761124 + 7789681 = 2182^2 + 2791^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12550805 - 2⁴ = 12550789 is a prime.

It is a super-2 number, since 2×12550805² = 315045412296050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10970 + ... + 12059.

It is an arithmetic number, because the mean of its divisors is an integer number (1899975).

Almost surely, 2^12550805 is an apocalyptic number.

It is an amenable number.

12550805 is a deficient number, since it is larger than the sum of its proper divisors (2648995).

12550805 is a wasteful number, since it uses less digits than its factorization.

12550805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23143.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 12550805 is about 3542.7115321460. The cubic root of 12550805 is about 232.3934378896.

The spelling of 12550805 in words is "twelve million, five hundred fifty thousand, eight hundred five".