12345555 has 24 divisors (see below), whose sum is σ = 20201328. Its totient is φ = 6438016.

The previous prime is 12345547. The next prime is 12345559. The reversal of 12345555 is 55554321.

It is a happy number.

12345555 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12345555 - 2³ = 12345547 is a prime.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (12345559) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41989 + ... + 42281.

It is an arithmetic number, because the mean of its divisors is an integer number (841722).

Almost surely, 2^12345555 is an apocalyptic number.

12345555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12345555 is a deficient number, since it is larger than the sum of its proper divisors (7855773).

12345555 is an equidigital number, since it uses as much as digits as its factorization.

12345555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407 (or 354 counting only the distinct ones).

The product of its digits is 15000, while the sum is 30.

The square root of 12345555 is about 3513.6241973211. The cubic root of 12345555 is about 231.1196509127.

Adding to 12345555 its reverse (55554321), we get a palindrome (67899876).

The spelling of 12345555 in words is "twelve million, three hundred forty-five thousand, five hundred fifty-five".