1125750561 has 16 divisors (see below), whose sum is σ = 1619782080. Its totient is φ = 691346880.

The previous prime is 1125750559. The next prime is 1125750569. The reversal of 1125750561 is 1650575211.

It is a happy number.

It is not a de Polignac number, because 1125750561 - 2¹ = 1125750559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1125750569) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 10246 + ... + 48543.

It is an arithmetic number, because the mean of its divisors is an integer number (101236380).

Almost surely, 2^1125750561 is an apocalyptic number.

It is an amenable number.

1125750561 is a deficient number, since it is larger than the sum of its proper divisors (494031519).

1125750561 is a wasteful number, since it uses less digits than its factorization.

1125750561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59296.

The product of its (nonzero) digits is 10500, while the sum is 33.

The square root of 1125750561 is about 33552.2064997222. The cubic root of 1125750561 is about 1040.2731534109.

The spelling of 1125750561 in words is "one billion, one hundred twenty-five million, seven hundred fifty thousand, five hundred sixty-one".