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12523 = 71789
BaseRepresentation
bin11000011101011
3122011211
43003223
5400043
6133551
751340
oct30353
918154
1012523
119455
1272b7
135914
1447c7
153a9d
hex30eb

12523 has 4 divisors (see below), whose sum is σ = 14320. Its totient is φ = 10728.

The previous prime is 12517. The next prime is 12527. The reversal of 12523 is 32521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32521 = 171913.

It is a cyclic number.

It is not a de Polignac number, because 12523 - 25 = 12491 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 888 + ... + 901.

It is an arithmetic number, because the mean of its divisors is an integer number (3580).

212523 is an apocalyptic number.

12523 is a deficient number, since it is larger than the sum of its proper divisors (1797).

12523 is an equidigital number, since it uses as much as digits as its factorization.

12523 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1796.

The product of its digits is 60, while the sum is 13.

The square root of 12523 is about 111.9062107302. The cubic root of 12523 is about 23.2221696524. Note that the first 3 decimals are identical.

It can be divided in two parts, 12 and 523, that added together give a palindrome (535).

The spelling of 12523 in words is "twelve thousand, five hundred twenty-three".

Divisors: 1 7 1789 12523