1111125540 has 192 divisors, whose sum is σ = 3686989824. Its totient is φ = 244726272.

The previous prime is 1111125539. The next prime is 1111125563. The reversal of 1111125540 is 455211111.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1973299 + ... + 1973861.

It is an arithmetic number, because the mean of its divisors is an integer number (19203072).

Almost surely, 2^1111125540 is an apocalyptic number.

1111125540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111125540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1843494912).

1111125540 is an abundant number, since it is smaller than the sum of its proper divisors (2575864284).

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

1111125540 is a wasteful number, since it uses less digits than its factorization.

1111125540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746 (or 744 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 21.

The square root of 1111125540 is about 33333.5497659640. The cubic root of 1111125540 is about 1035.7486520231.

Adding to 1111125540 its reverse (455211111), we get a palindrome (1566336651).

The spelling of 1111125540 in words is "one billion, one hundred eleven million, one hundred twenty-five thousand, five hundred forty".