12015887 has 4 divisors (see below), whose sum is σ = 12940200. Its totient is φ = 11091576.

The previous prime is 12015863. The next prime is 12015907. The reversal of 12015887 is 78851021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78851021 = 181 ⋅435641.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12015887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12015187) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 462137 + ... + 462162.

It is an arithmetic number, because the mean of its divisors is an integer number (3235050).

Almost surely, 2^12015887 is an apocalyptic number.

12015887 is a deficient number, since it is larger than the sum of its proper divisors (924313).

12015887 is an equidigital number, since it uses as much as digits as its factorization.

12015887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924312.

The product of its (nonzero) digits is 4480, while the sum is 32.

The square root of 12015887 is about 3466.3939476061. The cubic root of 12015887 is about 229.0438377076.

The spelling of 12015887 in words is "twelve million, fifteen thousand, eight hundred eighty-seven".