13872515 has 4 divisors (see below), whose sum is σ = 16647024. Its totient is φ = 11098008.

The previous prime is 13872511. The next prime is 13872517. The reversal of 13872515 is 51527831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51527831 = 577 ⋅89303.

It is a cyclic number.

It is not a de Polignac number, because 13872515 - 2² = 13872511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13872511) 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 3 ways as a sum of consecutive naturals, for example, 1387247 + ... + 1387256.

It is an arithmetic number, because the mean of its divisors is an integer number (4161756).

Almost surely, 2^13872515 is an apocalyptic number.

13872515 is a deficient number, since it is larger than the sum of its proper divisors (2774509).

13872515 is an equidigital number, since it uses as much as digits as its factorization.

13872515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2774508.

The product of its digits is 8400, while the sum is 32.

The square root of 13872515 is about 3724.5825269418. The cubic root of 13872515 is about 240.2804303028.

The spelling of 13872515 in words is "thirteen million, eight hundred seventy-two thousand, five hundred fifteen".