12015387 has 6 divisors (see below), whose sum is σ = 17355572. Its totient is φ = 8010252.

The previous prime is 12015373. The next prime is 12015427. The reversal of 12015387 is 78351021.

12015387 is a `hidden beast` number, since 120 + 1 + 538 + 7 = 666.

It is not a de Polignac number, because 12015387 - 2¹⁰ = 12014363 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12015387.

It is not an unprimeable number, because it can be changed into a prime (12015307) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 667513 + ... + 667530.

Almost surely, 2^12015387 is an apocalyptic number.

12015387 is a deficient number, since it is larger than the sum of its proper divisors (5340185).

12015387 is a wasteful number, since it uses less digits than its factorization.

12015387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1335049 (or 1335046 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 12015387 is about 3466.3218257975. The cubic root of 12015387 is about 229.0406607052.

The spelling of 12015387 in words is "twelve million, fifteen thousand, three hundred eighty-seven".