12491250428 has 48 divisors (see below), whose sum is σ = 22644061440. Its totient is φ = 6025428864.

The previous prime is 12491250397. The next prime is 12491250433. The reversal of 12491250428 is 82405219421.

It is a junction number, because it is equal to n+sod(n) for n = 12491250391 and 12491250400.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9690008 + ... + 9691296.

It is an arithmetic number, because the mean of its divisors is an integer number (471751280).

Almost surely, 2^12491250428 is an apocalyptic number.

It is an amenable number.

12491250428 is a deficient number, since it is larger than the sum of its proper divisors (10152811012).

12491250428 is a wasteful number, since it uses less digits than its factorization.

12491250428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1986 (or 1984 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

Adding to 12491250428 its reverse (82405219421), we get a palindrome (94896469849).

The spelling of 12491250428 in words is "twelve billion, four hundred ninety-one million, two hundred fifty thousand, four hundred twenty-eight".