12090947 has 4 divisors (see below), whose sum is σ = 13190136. Its totient is φ = 10991760.

The previous prime is 12090937. The next prime is 12090959. The reversal of 12090947 is 74909021.

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 12090947 - 2⁴ = 12090931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12090937) 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, 549578 + ... + 549599.

It is an arithmetic number, because the mean of its divisors is an integer number (3297534).

Almost surely, 2^12090947 is an apocalyptic number.

12090947 is a deficient number, since it is larger than the sum of its proper divisors (1099189).

12090947 is a wasteful number, since it uses less digits than its factorization.

12090947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1099188.

The product of its (nonzero) digits is 4536, while the sum is 32.

The square root of 12090947 is about 3477.2039054390. The cubic root of 12090947 is about 229.5197730585.

Adding to 12090947 its reverse (74909021), we get a palindrome (86999968).

The spelling of 12090947 in words is "twelve million, ninety thousand, nine hundred forty-seven".