13645005 has 32 divisors (see below), whose sum is σ = 24409728. Its totient is φ = 6451200.

The previous prime is 13645001. The next prime is 13645013. The reversal of 13645005 is 50054631.

It is not a de Polignac number, because 13645005 - 2² = 13645001 is a prime.

It is a super-3 number, since 3×13645005³ (a number of 22 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13645001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5757 + ... + 7773.

It is an arithmetic number, because the mean of its divisors is an integer number (762804).

Almost surely, 2^13645005 is an apocalyptic number.

13645005 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13645005 is a deficient number, since it is larger than the sum of its proper divisors (10764723).

13645005 is a wasteful number, since it uses less digits than its factorization.

13645005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077.

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

The square root of 13645005 is about 3693.9145902416. The cubic root of 13645005 is about 238.9596460874.

Adding to 13645005 its reverse (50054631), we get a palindrome (63699636).

The spelling of 13645005 in words is "thirteen million, six hundred forty-five thousand, five".