12545042407 has 4 divisors (see below), whose sum is σ = 13282986096. Its totient is φ = 11807098720.

The previous prime is 12545042381. The next prime is 12545042417. The reversal of 12545042407 is 70424054521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70424054521 = 1693 ⋅41597197.

It is a cyclic number.

It is not a de Polignac number, because 12545042407 - 2²³ = 12536653799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12545042417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368971819 + ... + 368971852.

It is an arithmetic number, because the mean of its divisors is an integer number (3320746524).

Almost surely, 2^12545042407 is an apocalyptic number.

12545042407 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12545042407 is a deficient number, since it is larger than the sum of its proper divisors (737943689).

12545042407 is an equidigital number, since it uses as much as digits as its factorization.

12545042407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737943688.

The product of its (nonzero) digits is 44800, while the sum is 34.

Adding to 12545042407 its reverse (70424054521), we get a palindrome (82969096928).

The spelling of 12545042407 in words is "twelve billion, five hundred forty-five million, forty-two thousand, four hundred seven".