13545445 has 8 divisors (see below), whose sum is σ = 16281720. Its totient is φ = 10818240.

The previous prime is 13545437. The next prime is 13545449. The reversal of 13545445 is 54454531.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1560001 + 11985444 = 1249^2 + 3462^2 .

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

It is not a de Polignac number, because 13545445 - 2³ = 13545437 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13545449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1635 + ... + 5455.

It is an arithmetic number, because the mean of its divisors is an integer number (2035215).

Almost surely, 2^13545445 is an apocalyptic number.

It is an amenable number.

13545445 is a deficient number, since it is larger than the sum of its proper divisors (2736275).

13545445 is an equidigital number, since it uses as much as digits as its factorization.

13545445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4535.

The product of its digits is 24000, while the sum is 31.

The square root of 13545445 is about 3680.4136995724. The cubic root of 13545445 is about 238.3770416629.

Adding to 13545445 its product of digits (24000), we get a triangular number (13569445 = T₅₂₀₉).

Adding to 13545445 its reverse (54454531), we get a palindrome (67999976).

The spelling of 13545445 in words is "thirteen million, five hundred forty-five thousand, four hundred forty-five".