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12445 = 519131
BaseRepresentation
bin11000010011101
3122001221
43002131
5344240
6133341
751166
oct30235
918057
1012445
119394
127251
135884
14476d
153a4a
hex309d

12445 has 8 divisors (see below), whose sum is σ = 15840. Its totient is φ = 9360.

The previous prime is 12437. The next prime is 12451. The reversal of 12445 is 54421.

12445 = 162 + 172 + ... + 342.

12445 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12445 - 23 = 12437 is a prime.

It is a plaindrome in base 10.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30 + ... + 160.

It is an arithmetic number, because the mean of its divisors is an integer number (1980).

212445 is an apocalyptic number.

It is an amenable number.

12445 is a deficient number, since it is larger than the sum of its proper divisors (3395).

12445 is a wasteful number, since it uses less digits than its factorization.

12445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155.

The product of its digits is 160, while the sum is 16.

The square root of 12445 is about 111.5571602364. The cubic root of 12445 is about 23.1738558047.

Adding to 12445 its reverse (54421), we get a palindrome (66866).

It can be divided in two parts, 124 and 45, that added together give a square (169 = 132).

The spelling of 12445 in words is "twelve thousand, four hundred forty-five".

Divisors: 1 5 19 95 131 655 2489 12445