12009835 has 4 divisors (see below), whose sum is σ = 14411808. Its totient is φ = 9607864.

The previous prime is 12009827. The next prime is 12009859. The reversal of 12009835 is 53890021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 53890021 = 2143 ⋅25147.

It is a cyclic number.

It is not a de Polignac number, because 12009835 - 2³ = 12009827 is a prime.

It is a super-2 number, since 2×12009835² = 288472273454450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 1200979 + ... + 1200988.

It is an arithmetic number, because the mean of its divisors is an integer number (3602952).

Almost surely, 2^12009835 is an apocalyptic number.

12009835 is a deficient number, since it is larger than the sum of its proper divisors (2401973).

12009835 is an equidigital number, since it uses as much as digits as its factorization.

12009835 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2401972.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 12009835 is about 3465.5208843693. The cubic root of 12009835 is about 229.0053773456.

Adding to 12009835 its reverse (53890021), we get a palindrome (65899856).

The spelling of 12009835 in words is "twelve million, nine thousand, eight hundred thirty-five".