13872005 has 32 divisors (see below), whose sum is σ = 20044800. Its totient is φ = 9015552.

The previous prime is 13871999. The next prime is 13872007. The reversal of 13872005 is 50027831.

It is not a de Polignac number, because 13872005 - 2⁴ = 13871989 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13872007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 80099 + ... + 80271.

It is an arithmetic number, because the mean of its divisors is an integer number (626400).

Almost surely, 2^13872005 is an apocalyptic number.

It is an amenable number.

13872005 is a deficient number, since it is larger than the sum of its proper divisors (6172795).

13872005 is a wasteful number, since it uses less digits than its factorization.

13872005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 13872005 is about 3724.5140622637. The cubic root of 13872005 is about 240.2774857629.

Adding to 13872005 its reverse (50027831), we get a palindrome (63899836).

The spelling of 13872005 in words is "thirteen million, eight hundred seventy-two thousand, five".