12090647 has 4 divisors (see below), whose sum is σ = 12117336. Its totient is φ = 12063960.

The previous prime is 12090641. The next prime is 12090649. The reversal of 12090647 is 74609021.

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

It is a cyclic number.

It is not a de Polignac number, because 12090647 - 2⁶ = 12090583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12090641) 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, 12653 + ... + 13574.

It is an arithmetic number, because the mean of its divisors is an integer number (3029334).

Almost surely, 2^12090647 is an apocalyptic number.

12090647 is a deficient number, since it is larger than the sum of its proper divisors (26689).

12090647 is an equidigital number, since it uses as much as digits as its factorization.

12090647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26688.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 12090647 is about 3477.1607670627. The cubic root of 12090647 is about 229.5178747649.

Adding to 12090647 its reverse (74609021), we get a palindrome (86699668).

The spelling of 12090647 in words is "twelve million, ninety thousand, six hundred forty-seven".