12525442428 has 96 divisors (see below), whose sum is σ = 31074624000. Its totient is φ = 3915696384.

The previous prime is 12525442421. The next prime is 12525442429. The reversal of 12525442428 is 82424452521.

It is a congruent number.

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

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17087550 + ... + 17088282.

It is an arithmetic number, because the mean of its divisors is an integer number (323694000).

Almost surely, 2^12525442428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12525442428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15537312000).

12525442428 is an abundant number, since it is smaller than the sum of its proper divisors (18549181572).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12525442428 is a wasteful number, since it uses less digits than its factorization.

12525442428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1411 (or 1409 counting only the distinct ones).

The product of its digits is 204800, while the sum is 39.

Adding to 12525442428 its reverse (82424452521), we get a palindrome (94949894949).

The spelling of 12525442428 in words is "twelve billion, five hundred twenty-five million, four hundred forty-two thousand, four hundred twenty-eight".