12381087 has 4 divisors (see below), whose sum is σ = 16508120. Its totient is φ = 8254056.

The previous prime is 12381073. The next prime is 12381113. The reversal of 12381087 is 78018321.

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 12381087 - 2⁶ = 12381023 is a prime.

It is a super-3 number, since 3×12381087³ (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12381037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2063512 + ... + 2063517.

It is an arithmetic number, because the mean of its divisors is an integer number (4127030).

Almost surely, 2^12381087 is an apocalyptic number.

12381087 is a deficient number, since it is larger than the sum of its proper divisors (4127033).

12381087 is an equidigital number, since it uses as much as digits as its factorization.

12381087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4127032.

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

The square root of 12381087 is about 3518.6768820112. The cubic root of 12381087 is about 231.3411686303.

The spelling of 12381087 in words is "twelve million, three hundred eighty-one thousand, eighty-seven".