13645543 has 8 divisors (see below), whose sum is σ = 14590368. Its totient is φ = 12716544.

The previous prime is 13645537. The next prime is 13645589. The reversal of 13645543 is 34554631.

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

It is not a de Polignac number, because 13645543 - 2¹⁷ = 13514471 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 (13645043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2146 + ... + 5647.

It is an arithmetic number, because the mean of its divisors is an integer number (1823796).

Almost surely, 2^13645543 is an apocalyptic number.

13645543 is a deficient number, since it is larger than the sum of its proper divisors (944825).

13645543 is a wasteful number, since it uses less digits than its factorization.

13645543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7913.

The product of its digits is 21600, while the sum is 31.

The square root of 13645543 is about 3693.9874119980. The cubic root of 13645543 is about 238.9627866408.

The spelling of 13645543 in words is "thirteen million, six hundred forty-five thousand, five hundred forty-three".