12056909 has 4 divisors (see below), whose sum is σ = 12082560. Its totient is φ = 12031260.

The previous prime is 12056881. The next prime is 12056929. The reversal of 12056909 is 90965021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12056909 - 2¹⁶ = 11991373 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 (12056929) 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, 12107 + ... + 13064.

It is an arithmetic number, because the mean of its divisors is an integer number (3020640).

Almost surely, 2^12056909 is an apocalyptic number.

It is an amenable number.

12056909 is a deficient number, since it is larger than the sum of its proper divisors (25651).

12056909 is an equidigital number, since it uses as much as digits as its factorization.

12056909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25650.

The product of its (nonzero) digits is 4860, while the sum is 32.

The square root of 12056909 is about 3472.3060061003. The cubic root of 12056909 is about 229.3041920242.

The spelling of 12056909 in words is "twelve million, fifty-six thousand, nine hundred nine".