12081387 has 4 divisors (see below), whose sum is σ = 16108520. Its totient is φ = 8054256.

The previous prime is 12081343. The next prime is 12081389. The reversal of 12081387 is 78318021.

It is a happy number.

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

It is not a de Polignac number, because 12081387 - 2⁷ = 12081259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12081389) 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, 2013562 + ... + 2013567.

It is an arithmetic number, because the mean of its divisors is an integer number (4027130).

Almost surely, 2^12081387 is an apocalyptic number.

12081387 is a deficient number, since it is larger than the sum of its proper divisors (4027133).

12081387 is an equidigital number, since it uses as much as digits as its factorization.

12081387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4027132.

The product of its (nonzero) digits is 2688, while the sum is 30.

The square root of 12081387 is about 3475.8289658727. The cubic root of 12081387 is about 229.4592653198.

The spelling of 12081387 in words is "twelve million, eighty-one thousand, three hundred eighty-seven".