12507445 has 4 divisors (see below), whose sum is σ = 15008940. Its totient is φ = 10005952.

The previous prime is 12507433. The next prime is 12507449. The reversal of 12507445 is 54470521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 54470521 = 7 ⋅7781503.

It can be written as a sum of positive squares in 2 ways, for example, as 2829124 + 9678321 = 1682^2 + 3111^2 .

It is a cyclic number.

It is not a de Polignac number, because 12507445 - 2⁵ = 12507413 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12507449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1250740 + ... + 1250749.

It is an arithmetic number, because the mean of its divisors is an integer number (3752235).

Almost surely, 2^12507445 is an apocalyptic number.

It is an amenable number.

12507445 is a deficient number, since it is larger than the sum of its proper divisors (2501495).

12507445 is an equidigital number, since it uses as much as digits as its factorization.

12507445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2501494.

The product of its (nonzero) digits is 5600, while the sum is 28.

The square root of 12507445 is about 3536.5866312025. The cubic root of 12507445 is about 232.1255080413.

Adding to 12507445 its reverse (54470521), we get a palindrome (66977966).

The spelling of 12507445 in words is "twelve million, five hundred seven thousand, four hundred forty-five".