12505550 has 24 divisors (see below), whose sum is σ = 23613816. Its totient is φ = 4926240.

The previous prime is 12505543. The next prime is 12505579. The reversal of 12505550 is 5550521.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1484 + ... + 5216.

It is an arithmetic number, because the mean of its divisors is an integer number (983909).

Almost surely, 2^12505550 is an apocalyptic number.

12505550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12505550 is a deficient number, since it is larger than the sum of its proper divisors (11108266).

12505550 is a wasteful number, since it uses less digits than its factorization.

12505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3812 (or 3807 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 12505550 is about 3536.3187073566. The cubic root of 12505550 is about 232.1137843558.

The spelling of 12505550 in words is "twelve million, five hundred five thousand, five hundred fifty".