12312530 has 16 divisors (see below), whose sum is σ = 22927320. Its totient is φ = 4755072.

The previous prime is 12312511. The next prime is 12312557. The reversal of 12312530 is 3521321.

It can be written as a sum of positive squares in 4 ways, for example, as 11826721 + 485809 = 3439^2 + 697^2 .

It is a junction number, because it is equal to n+sod(n) for n = 12312499 and 12312508.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20939 + ... + 21518.

Almost surely, 2^12312530 is an apocalyptic number.

12312530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12312530 is a deficient number, since it is larger than the sum of its proper divisors (10614790).

12312530 is a wasteful number, since it uses less digits than its factorization.

12312530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42493.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 12312530 is about 3508.9214867249. The cubic root of 12312530 is about 230.9133811910.

Adding to 12312530 its reverse (3521321), we get a palindrome (15833851).

The spelling of 12312530 in words is "twelve million, three hundred twelve thousand, five hundred thirty".