12056805 has 12 divisors (see below), whose sum is σ = 20898540. Its totient is φ = 6430272.

The previous prime is 12056801. The next prime is 12056831. The reversal of 12056805 is 50865021.

It can be written as a sum of positive squares in 2 ways, for example, as 8608356 + 3448449 = 2934^2 + 1857^2 .

It is not a de Polignac number, because 12056805 - 2² = 12056801 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12056801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 133920 + ... + 134009.

It is an arithmetic number, because the mean of its divisors is an integer number (1741545).

Almost surely, 2^12056805 is an apocalyptic number.

12056805 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12056805 is a deficient number, since it is larger than the sum of its proper divisors (8841735).

12056805 is a wasteful number, since it uses less digits than its factorization.

12056805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267940 (or 267937 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 12056805 is about 3472.2910304293. The cubic root of 12056805 is about 229.3035327147.

The spelling of 12056805 in words is "twelve million, fifty-six thousand, eight hundred five".