13872415 has 4 divisors (see below), whose sum is σ = 16646904. Its totient is φ = 11097928.

The previous prime is 13872403. The next prime is 13872421. The reversal of 13872415 is 51427831.

13872415 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 13872415 - 2²¹ = 11775263 is a prime.

It is a Duffinian 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, 1387237 + ... + 1387246.

It is an arithmetic number, because the mean of its divisors is an integer number (4161726).

Almost surely, 2^13872415 is an apocalyptic number.

13872415 is a deficient number, since it is larger than the sum of its proper divisors (2774489).

13872415 is an equidigital number, since it uses as much as digits as its factorization.

13872415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774488.

The product of its digits is 6720, while the sum is 31.

The square root of 13872415 is about 3724.5691025943. The cubic root of 13872415 is about 240.2798529477.

The spelling of 13872415 in words is "thirteen million, eight hundred seventy-two thousand, four hundred fifteen".