12312555 has 8 divisors (see below), whose sum is σ = 19700112. Its totient is φ = 6566688.

The previous prime is 12312511. The next prime is 12312557. The reversal of 12312555 is 55521321.

It is a happy number.

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

It is not a de Polignac number, because 12312555 - 2⁷ = 12312427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12312557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410404 + ... + 410433.

It is an arithmetic number, because the mean of its divisors is an integer number (2462514).

Almost surely, 2^12312555 is an apocalyptic number.

12312555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12312555 is a deficient number, since it is larger than the sum of its proper divisors (7387557).

12312555 is an equidigital number, since it uses as much as digits as its factorization.

12312555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820845.

The product of its digits is 1500, while the sum is 24.

The square root of 12312555 is about 3508.9250490713. The cubic root of 12312555 is about 230.9135374771.

Adding to 12312555 its reverse (55521321), we get a palindrome (67833876).

The spelling of 12312555 in words is "twelve million, three hundred twelve thousand, five hundred fifty-five".