12525442427 has 16 divisors (see below), whose sum is σ = 13671491040. Its totient is φ = 11427245568.

The previous prime is 12525442421. The next prime is 12525442429. The reversal of 12525442427 is 72424452521.

It is a cyclic number.

It is not a de Polignac number, because 12525442427 - 2³² = 8230475131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12525442421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132188 + ... + 206214.

It is an arithmetic number, because the mean of its divisors is an integer number (854468190).

Almost surely, 2^12525442427 is an apocalyptic number.

12525442427 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

12525442427 is a deficient number, since it is larger than the sum of its proper divisors (1146048613).

12525442427 is a wasteful number, since it uses less digits than its factorization.

12525442427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74350.

The product of its digits is 179200, while the sum is 38.

Adding to 12525442427 its reverse (72424452521), we get a palindrome (84949894948).

The spelling of 12525442427 in words is "twelve billion, five hundred twenty-five million, four hundred forty-two thousand, four hundred twenty-seven".