12000555 has 96 divisors (see below), whose sum is σ = 26417664. Its totient is φ = 5101056.

The previous prime is 12000551. The next prime is 12000559. The reversal of 12000555 is 55500021.

It is an interprime number because it is at equal distance from previous prime (12000551) and next prime (12000559).

It is not a de Polignac number, because 12000555 - 2² = 12000551 is a prime.

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 95 ways as a sum of consecutive naturals, for example, 144544 + ... + 144626.

It is an arithmetic number, because the mean of its divisors is an integer number (275184).

Almost surely, 2^12000555 is an apocalyptic number.

12000555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12000555 is an abundant number, since it is smaller than the sum of its proper divisors (14417109).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12000555 is an equidigital number, since it uses as much as digits as its factorization.

12000555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 12000555 is about 3464.1817215614. The cubic root of 12000555 is about 228.9463779918.

Adding to 12000555 its reverse (55500021), we get a palindrome (67500576).

The spelling of 12000555 in words is "twelve million, five hundred fifty-five", and thus it is an aban number.