13505406 has 8 divisors (see below), whose sum is σ = 27010824. Its totient is φ = 4501800.

The previous prime is 13505381. The next prime is 13505411. The reversal of 13505406 is 60450531.

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

13505406 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1125445 + ... + 1125456.

It is an arithmetic number, because the mean of its divisors is an integer number (3376353).

Almost surely, 2^13505406 is an apocalyptic number.

13505406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13505406 is a wasteful number, since it uses less digits than its factorization.

13505406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2250906.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 13505406 is about 3674.9702039608. The cubic root of 13505406 is about 238.1419368503.

Adding to 13505406 its reverse (60450531), we get a palindrome (73955937).

It can be divided in two parts, 1350540 and 6, that added together give a triangular number (1350546 = T₁₆₄₃).

The spelling of 13505406 in words is "thirteen million, five hundred five thousand, four hundred six".