13887015 has 16 divisors (see below), whose sum is σ = 22502400. Its totient is φ = 7312032.

The previous prime is 13887001. The next prime is 13887019. The reversal of 13887015 is 51078831.

It is not a de Polignac number, because 13887015 - 2¹¹ = 13884967 is a prime.

It is a super-2 number, since 2×13887015² = 385698371220450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887019) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4675 + ... + 7044.

It is an arithmetic number, because the mean of its divisors is an integer number (1406400).

Almost surely, 2^13887015 is an apocalyptic number.

13887015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

13887015 is a deficient number, since it is larger than the sum of its proper divisors (8615385).

13887015 is a wasteful number, since it uses less digits than its factorization.

13887015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11806.

The product of its (nonzero) digits is 6720, while the sum is 33.

The square root of 13887015 is about 3726.5285454428. The cubic root of 13887015 is about 240.3641174366.

It can be divided in two parts, 138 and 87015, that added together give a triangular number (87153 = T₄₁₇).

The spelling of 13887015 in words is "thirteen million, eight hundred eighty-seven thousand, fifteen".