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12550 = 252251

12550 has 12 divisors (see below), whose sum is σ = 23436. Its totient is φ = 5000.

The previous prime is 12547. The next prime is 12553. The reversal of 12550 is 5521.

It is an interprime number because it is at equal distance from previous prime (12547) and next prime (12553).

It is a self number, because there is not a number n which added to its sum of digits gives 12550.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 76 + ... + 175.

It is an arithmetic number, because the mean of its divisors is an integer number (1953).

12550 is a Friedman number, since it can be written as 251*50, using all its digits and the basic arithmetic operations.

212550 is an apocalyptic number.

12550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12550 is a deficient number, since it is larger than the sum of its proper divisors (10886).

12550 is a wasteful number, since it uses less digits than its factorization.

12550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 13.

The square root of 12550 is about 112.0267825120. The cubic root of 12550 is about 23.2388469265.

The spelling of 12550 in words is "twelve thousand, five hundred fifty".

Divisors: 1 2 5 10 25 50 251 502 1255 2510 6275 12550