1125771840 has 84 divisors (see below), whose sum is σ = 3872195964. Its totient is φ = 300205056.

The previous prime is 1125771833. The next prime is 1125771853. The reversal of 1125771840 is 481775211.

1125771840 is a `hidden beast` number, since 1 + 1 + 2 + 577 + 1 + 84 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 176145984 + 949625856 = 13272^2 + 30816^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1125771795 and 1125771804.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 192567 + ... + 198326.

It is an arithmetic number, because the mean of its divisors is an integer number (46097571).

Almost surely, 2^1125771840 is an apocalyptic number.

1125771840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125771840 is an abundant number, since it is smaller than the sum of its proper divisors (2746424124).

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

1125771840 is a wasteful number, since it uses less digits than its factorization.

1125771840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390916 (or 390903 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 36.

The square root of 1125771840 is about 33552.5236010646. The cubic root of 1125771840 is about 1040.2797078034.

The spelling of 1125771840 in words is "one billion, one hundred twenty-five million, seven hundred seventy-one thousand, eight hundred forty".