12087817 has 8 divisors (see below), whose sum is σ = 13888512. Its totient is φ = 10305600.

The previous prime is 12087793. The next prime is 12087839. The reversal of 12087817 is 71878021.

12087817 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12087817 - 2⁷ = 12087689 is a prime.

It is a super-2 number, since 2×12087817² = 292230639650978, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12087847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3184 + ... + 5857.

It is an arithmetic number, because the mean of its divisors is an integer number (1736064).

Almost surely, 2^12087817 is an apocalyptic number.

It is an amenable number.

12087817 is a deficient number, since it is larger than the sum of its proper divisors (1800695).

12087817 is an equidigital number, since it uses as much as digits as its factorization.

12087817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9239.

The product of its (nonzero) digits is 6272, while the sum is 34.

The square root of 12087817 is about 3476.7538020401. The cubic root of 12087817 is about 229.4999659833.

It can be divided in two parts, 1208 and 7817, that added together give a square (9025 = 95²).

The spelling of 12087817 in words is "twelve million, eighty-seven thousand, eight hundred seventeen".