13505545 has 4 divisors (see below), whose sum is σ = 16206660. Its totient is φ = 10804432.

The previous prime is 13505537. The next prime is 13505551. The reversal of 13505545 is 54550531.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8874441 + 4631104 = 2979^2 + 2152^2 .

It is a cyclic number.

It is not a de Polignac number, because 13505545 - 2³ = 13505537 is a prime.

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, 1350550 + ... + 1350559.

It is an arithmetic number, because the mean of its divisors is an integer number (4051665).

Almost surely, 2^13505545 is an apocalyptic number.

It is an amenable number.

13505545 is a deficient number, since it is larger than the sum of its proper divisors (2701115).

13505545 is an equidigital number, since it uses as much as digits as its factorization.

13505545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2701114.

The product of its (nonzero) digits is 7500, while the sum is 28.

The square root of 13505545 is about 3674.9891156301. The cubic root of 13505545 is about 238.1427538470.

The spelling of 13505545 in words is "thirteen million, five hundred five thousand, five hundred forty-five".