12009605 has 8 divisors (see below), whose sum is σ = 14434200. Its totient is φ = 9592576.

The previous prime is 12009593. The next prime is 12009623. The reversal of 12009605 is 50690021.

It can be written as a sum of positive squares in 4 ways, for example, as 401956 + 11607649 = 634^2 + 3407^2 .

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 12009605 - 2⁶ = 12009541 is a prime.

It is a super-2 number, since 2×12009605² = 288461224512050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2561 + ... + 5529.

It is an arithmetic number, because the mean of its divisors is an integer number (1804275).

Almost surely, 2^12009605 is an apocalyptic number.

It is an amenable number.

12009605 is a deficient number, since it is larger than the sum of its proper divisors (2424595).

12009605 is an equidigital number, since it uses as much as digits as its factorization.

12009605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3783.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 12009605 is about 3465.4877001657. The cubic root of 12009605 is about 229.0039154445.

Adding to 12009605 its reverse (50690021), we get a palindrome (62699626).

The spelling of 12009605 in words is "twelve million, nine thousand, six hundred five".