1011125856 has 96 divisors (see below), whose sum is σ = 2884986720. Its totient is φ = 308219904.

The previous prime is 1011125833. The next prime is 1011125917. The reversal of 1011125856 is 6585211101.

It is a tau number, because it is divible by the number of its divisors (96).

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, 132316 + ... + 139748.

It is an arithmetic number, because the mean of its divisors is an integer number (30051945).

Almost surely, 2^1011125856 is an apocalyptic number.

1011125856 is a gapful number since it is divisible by the number (16) 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 1011125856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1442493360).

1011125856 is an abundant number, since it is smaller than the sum of its proper divisors (1873860864).

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

1011125856 is a wasteful number, since it uses less digits than its factorization.

1011125856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7568 (or 7560 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 30.

The square root of 1011125856 is about 31798.2052323712. The cubic root of 1011125856 is about 1003.6949492018.

Adding to 1011125856 its reverse (6585211101), we get a palindrome (7596336957).

The spelling of 1011125856 in words is "one billion, eleven million, one hundred twenty-five thousand, eight hundred fifty-six".