12321507 has 8 divisors (see below), whose sum is σ = 17922240. Its totient is φ = 7467560.

The previous prime is 12321499. The next prime is 12321511. The reversal of 12321507 is 70512321.

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

It is a cyclic number.

It is not a de Polignac number, because 12321507 - 2³ = 12321499 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12321577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 186657 + ... + 186722.

It is an arithmetic number, because the mean of its divisors is an integer number (2240280).

Almost surely, 2^12321507 is an apocalyptic number.

12321507 is a deficient number, since it is larger than the sum of its proper divisors (5600733).

12321507 is a wasteful number, since it uses less digits than its factorization.

12321507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373393.

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 12321507 is about 3510.2004216284. The cubic root of 12321507 is about 230.9694867963.

Adding to 12321507 its reverse (70512321), we get a palindrome (82833828).

The spelling of 12321507 in words is "twelve million, three hundred twenty-one thousand, five hundred seven".