12345507 has 8 divisors (see below), whose sum is σ = 18289680. Its totient is φ = 8230320.

The previous prime is 12345499. The next prime is 12345511. The reversal of 12345507 is 70554321.

It is a happy number.

It is not a de Polignac number, because 12345507 - 2³ = 12345499 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 457241 = 12345507 / (1 + 2 + 3 + 4 + 5 + 5 + 0 + 7).

It is not an unprimeable number, because it can be changed into a prime (12345517) 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, 228594 + ... + 228647.

It is an arithmetic number, because the mean of its divisors is an integer number (2286210).

Almost surely, 2^12345507 is an apocalyptic number.

12345507 is a deficient number, since it is larger than the sum of its proper divisors (5944173).

12345507 is an equidigital number, since it uses as much as digits as its factorization.

12345507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 457250 (or 457244 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 12345507 is about 3513.6173667604. The cubic root of 12345507 is about 231.1193513783.

Adding to 12345507 its reverse (70554321), we get a palindrome (82899828).

The spelling of 12345507 in words is "twelve million, three hundred forty-five thousand, five hundred seven".