13156 has 24 divisors (see below), whose sum is σ = 28224. Its totient is φ = 5280.
The previous prime is 13151. The next prime is 13159. The reversal of 13156 is 65131.
13156 = T23 + T24 + ... + T44.
13156 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.
It is a nialpdrome in base 11 and base 12.
It is a zygodrome in base 12.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (13151) by changing a digit.
13156 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 561 + ... + 583.
It is an arithmetic number, because the mean of its divisors is an integer number (1176).
It is an amenable number.
13156 is an abundant number, since it is smaller than the sum of its proper divisors (15068).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14112).
13156 is a wasteful number, since it uses less digits than its factorization.
13156 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 51 (or 49 counting only the distinct ones).
The product of its digits is 90, while the sum is 16.
The square root of 13156 is about 114.6996076715. The cubic root of 13156 is about 23.6070265394.
Adding to 13156 its reverse (65131), we get a palindrome (78287).
It can be divided in two parts, 13 and 156, that added together give a square (169 = 132).
The spelling of 13156 in words is "thirteen thousand, one hundred fifty-six".
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