12009526 has 4 divisors (see below), whose sum is σ = 18014292. Its totient is φ = 6004762.

The previous prime is 12009523. The next prime is 12009541. The reversal of 12009526 is 62590021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62590021 = 13 ⋅4814617.

It is a self number, because there is not a number n which added to its sum of digits gives 12009526.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12009521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3002380 + ... + 3002383.

It is an arithmetic number, because the mean of its divisors is an integer number (4503573).

Almost surely, 2^12009526 is an apocalyptic number.

12009526 is a deficient number, since it is larger than the sum of its proper divisors (6004766).

12009526 is an equidigital number, since it uses as much as digits as its factorization.

12009526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6004765.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12009526 is about 3465.4763020399. The cubic root of 12009526 is about 229.0034133089.

Adding to 12009526 its reverse (62590021), we get a palindrome (74599547).

The spelling of 12009526 in words is "twelve million, nine thousand, five hundred twenty-six".