13005478 has 4 divisors (see below), whose sum is σ = 19508220. Its totient is φ = 6502738.

The previous prime is 13005457. The next prime is 13005491. The reversal of 13005478 is 87450031.

13005478 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: 87450031 = 1979 ⋅44189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3251368 + ... + 3251371.

It is an arithmetic number, because the mean of its divisors is an integer number (4877055).

Almost surely, 2^13005478 is an apocalyptic number.

13005478 is a deficient number, since it is larger than the sum of its proper divisors (6502742).

13005478 is an equidigital number, since it uses as much as digits as its factorization.

13005478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6502741.

The product of its (nonzero) digits is 3360, while the sum is 28.

The square root of 13005478 is about 3606.3108573721. The cubic root of 13005478 is about 235.1664913429.

The spelling of 13005478 in words is "thirteen million, five thousand, four hundred seventy-eight".