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12725 = 52509
BaseRepresentation
bin11000110110101
3122110022
43012311
5401400
6134525
752046
oct30665
918408
1012725
119619
127445
135a3b
1448cd
153b85
hex31b5

12725 has 6 divisors (see below), whose sum is σ = 15810. Its totient is φ = 10160.

The previous prime is 12721. The next prime is 12739. The reversal of 12725 is 52721.

It can be divided in two parts, 12 and 725, that added together give a palindrome (737).

It can be written as a sum of positive squares in 3 ways, for example, as 2116 + 10609 = 46^2 + 103^2 .

It is not a de Polignac number, because 12725 - 22 = 12721 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 230 + ... + 279.

It is an arithmetic number, because the mean of its divisors is an integer number (2635).

212725 is an apocalyptic number.

It is an amenable number.

12725 is a deficient number, since it is larger than the sum of its proper divisors (3085).

12725 is an equidigital number, since it uses as much as digits as its factorization.

12725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519 (or 514 counting only the distinct ones).

The product of its digits is 140, while the sum is 17.

The square root of 12725 is about 112.8051417268. The cubic root of 12725 is about 23.3463646030.

The spelling of 12725 in words is "twelve thousand, seven hundred twenty-five".

Divisors: 1 5 25 509 2545 12725