1125749808 has 60 divisors (see below), whose sum is σ = 3159133120. Its totient is φ = 374226048.

The previous prime is 1125749803. The next prime is 1125749813. The reversal of 1125749808 is 8089475211.

It is an interprime number because it is at equal distance from previous prime (1125749803) and next prime (1125749813).

It is not an unprimeable number, because it can be changed into a prime (1125749803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 43233 + ... + 64191.

Almost surely, 2^1125749808 is an apocalyptic number.

1125749808 is a gapful number since it is divisible by the number (18) 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 1125749808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1579566560).

1125749808 is an abundant number, since it is smaller than the sum of its proper divisors (2033383312).

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

1125749808 is a wasteful number, since it uses less digits than its factorization.

1125749808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21346 (or 21337 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1125749808 is about 33552.1952784017. The cubic root of 1125749808 is about 1040.2729214691.

The spelling of 1125749808 in words is "one billion, one hundred twenty-five million, seven hundred forty-nine thousand, eight hundred eight".