13156543 has 4 divisors (see below), whose sum is σ = 13164448. Its totient is φ = 13148640.

The previous prime is 13156537. The next prime is 13156547. The reversal of 13156543 is 34565131.

13156543 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 34565131 = 17 ⋅2033243.

It is a cyclic number.

It is not a de Polignac number, because 13156543 - 2¹³ = 13148351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13156547) 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, 378 + ... + 5143.

It is an arithmetic number, because the mean of its divisors is an integer number (3291112).

Almost surely, 2^13156543 is an apocalyptic number.

13156543 is a deficient number, since it is larger than the sum of its proper divisors (7905).

13156543 is an equidigital number, since it uses as much as digits as its factorization.

13156543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7904.

The product of its digits is 5400, while the sum is 28.

The square root of 13156543 is about 3627.1949216991. The cubic root of 13156543 is about 236.0735131992.

The spelling of 13156543 in words is "thirteen million, one hundred fifty-six thousand, five hundred forty-three".