11525124042 has 56 divisors (see below), whose sum is σ = 26014156356. Its totient is φ = 3827704896.

The previous prime is 11525124031. The next prime is 11525124049. The reversal of 11525124042 is 24042152511.

It is a happy number.

11525124042 is a `hidden beast` number, since 1 + 1 + 5 + 251 + 2 + 404 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 9856319841 + 1668804201 = 99279^2 + 40851^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 11525123997 and 11525124015.

It is not an unprimeable number, because it can be changed into a prime (11525124049) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 389598 + ... + 418134.

Almost surely, 2^11525124042 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11525124042, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13007078178).

11525124042 is an abundant number, since it is smaller than the sum of its proper divisors (14489032314).

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

11525124042 is an equidigital number, since it uses as much as digits as its factorization.

11525124042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28834 (or 28819 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

Adding to 11525124042 its reverse (24042152511), we get a palindrome (35567276553).

The spelling of 11525124042 in words is "eleven billion, five hundred twenty-five million, one hundred twenty-four thousand, forty-two".