12545 has 8 divisors (see below), whose sum is σ = 16296. Its totient is φ = 9216.

The previous prime is 12541. The next prime is 12547. The reversal of 12545 is 54521.

12545 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 112²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 12544 = 1^2 + 112^2 .

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 12545 - 2² = 12541 is a prime.

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

It is a Duffinian number.

12545 is strictly pandigital in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32 + ... + 161.

It is an arithmetic number, because the mean of its divisors is an integer number (2037).

It is a Proth number, since it is equal to 49 ⋅ 2⁸ + 1 and 49 < 2⁸.

2¹²⁵⁴⁵ is an apocalyptic number.

12545 is the 65-th octagonal number.

It is an amenable number.

12545 is a deficient number, since it is larger than the sum of its proper divisors (3751).

12545 is a wasteful number, since it uses less digits than its factorization.

12545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211.

The product of its digits is 200, while the sum is 17.

The square root of 12545 is about 112.0044641967. The cubic root of 12545 is about 23.2357603483.

It can be divided in two parts, 125 and 45, that multiplied together give a square (5625 = 75²).

The spelling of 12545 in words is "twelve thousand, five hundred forty-five".