1125657685 has 4 divisors (see below), whose sum is σ = 1350789228. Its totient is φ = 900526144.

The previous prime is 1125657683. The next prime is 1125657713. The reversal of 1125657685 is 5867565211.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 299497636 + 826160049 = 17306^2 + 28743^2 .

It is a cyclic number.

It is not a de Polignac number, because 1125657685 - 2¹ = 1125657683 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125657683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112565764 + ... + 112565773.

It is an arithmetic number, because the mean of its divisors is an integer number (337697307).

Almost surely, 2^1125657685 is an apocalyptic number.

It is an amenable number.

1125657685 is a deficient number, since it is larger than the sum of its proper divisors (225131543).

1125657685 is an equidigital number, since it uses as much as digits as its factorization.

1125657685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225131542.

The product of its digits is 504000, while the sum is 46.

The square root of 1125657685 is about 33550.8224191301. The cubic root of 1125657685 is about 1040.2445446261.

The spelling of 1125657685 in words is "one billion, one hundred twenty-five million, six hundred fifty-seven thousand, six hundred eighty-five".