12087439 has 16 divisors (see below), whose sum is σ = 15662080. Its totient is φ = 9059040.

The previous prime is 12087437. The next prime is 12087451. The reversal of 12087439 is 93478021.

12087439 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 12087439 - 2¹ = 12087437 is a prime.

It is a super-2 number, since 2×12087439² = 292212363157442, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12087431) 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, 1767 + ... + 5224.

It is an arithmetic number, because the mean of its divisors is an integer number (978880).

Almost surely, 2^12087439 is an apocalyptic number.

12087439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

12087439 is a deficient number, since it is larger than the sum of its proper divisors (3574641).

12087439 is a wasteful number, since it uses less digits than its factorization.

12087439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7030.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 12087439 is about 3476.6994405614. The cubic root of 12087439 is about 229.4975737154.

The spelling of 12087439 in words is "twelve million, eighty-seven thousand, four hundred thirty-nine".