1091125841 has 16 divisors (see below), whose sum is σ = 1287090000. Its totient is φ = 915253248.

The previous prime is 1091125837. The next prime is 1091125873. The reversal of 1091125841 is 1485211901.

It can be written as a sum of positive squares in 8 ways, for example, as 82428241 + 1008697600 = 9079^2 + 31760^2 .

It is not a de Polignac number, because 1091125841 - 2² = 1091125837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1091125798 and 1091125807.

It is not an unprimeable number, because it can be changed into a prime (1091127841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78716 + ... + 91533.

It is an arithmetic number, because the mean of its divisors is an integer number (80443125).

Almost surely, 2^1091125841 is an apocalyptic number.

It is an amenable number.

1091125841 is a deficient number, since it is larger than the sum of its proper divisors (195964159).

1091125841 is a wasteful number, since it uses less digits than its factorization.

1091125841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170308.

The product of its (nonzero) digits is 2880, while the sum is 32.

The square root of 1091125841 is about 33032.1940082702. The cubic root of 1091125841 is about 1029.4966721055.

The spelling of 1091125841 in words is "one billion, ninety-one million, one hundred twenty-five thousand, eight hundred forty-one".