13285643 has 4 divisors (see below), whose sum is σ = 15183600. Its totient is φ = 11387688.

The previous prime is 13285633. The next prime is 13285663. The reversal of 13285643 is 34658231.

13285643 is digitally balanced in base 2, because in such base 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 an emirpimes, since its reverse is a distinct semiprime: 34658231 = 1471 ⋅23561.

It is a cyclic number.

It is not a de Polignac number, because 13285643 - 2¹⁴ = 13269259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13285603) 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, 948968 + ... + 948981.

It is an arithmetic number, because the mean of its divisors is an integer number (3795900).

Almost surely, 2^13285643 is an apocalyptic number.

13285643 is a deficient number, since it is larger than the sum of its proper divisors (1897957).

13285643 is an equidigital number, since it uses as much as digits as its factorization.

13285643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1897956.

The product of its digits is 17280, while the sum is 32.

The square root of 13285643 is about 3644.9475990746. The cubic root of 13285643 is about 236.8431668456.

The spelling of 13285643 in words is "thirteen million, two hundred eighty-five thousand, six hundred forty-three".