12000557 has 8 divisors (see below), whose sum is σ = 12310272. Its totient is φ = 11693200.

The previous prime is 12000551. The next prime is 12000559. The reversal of 12000557 is 75500021.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12000557 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 (12000551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14207 + ... + 15027.

It is an arithmetic number, because the mean of its divisors is an integer number (1538784).

Almost surely, 2^12000557 is an apocalyptic number.

It is an amenable number.

12000557 is a deficient number, since it is larger than the sum of its proper divisors (309715).

12000557 is an equidigital number, since it uses as much as digits as its factorization.

12000557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179.

The product of its (nonzero) digits is 350, while the sum is 20.

The square root of 12000557 is about 3464.1820102298. The cubic root of 12000557 is about 228.9463907105.

Adding to 12000557 its reverse (75500021), we get a palindrome (87500578).

The spelling of 12000557 in words is "twelve million, five hundred fifty-seven", and thus it is an aban number.