12055817 has 4 divisors (see below), whose sum is σ = 12062976. Its totient is φ = 12048660.

The previous prime is 12055811. The next prime is 12055837. The reversal of 12055817 is 71855021.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12055817 - 2⁴ = 12055801 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12055817.

It is not an unprimeable number, because it can be changed into a prime (12055811) 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, 488 + ... + 4934.

It is an arithmetic number, because the mean of its divisors is an integer number (3015744).

Almost surely, 2^12055817 is an apocalyptic number.

It is an amenable number.

12055817 is a deficient number, since it is larger than the sum of its proper divisors (7159).

12055817 is an equidigital number, since it uses as much as digits as its factorization.

12055817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7158.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 12055817 is about 3472.1487583340. The cubic root of 12055817 is about 229.2972690852.

The spelling of 12055817 in words is "twelve million, fifty-five thousand, eight hundred seventeen".