1125726609 has 8 divisors (see below), whose sum is σ = 1715392960. Its totient is φ = 643272336.

The previous prime is 1125726601. The next prime is 1125726629. The reversal of 1125726609 is 9066275211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1125726609 - 2³ = 1125726601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125726601) 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 7 ways as a sum of consecutive naturals, for example, 26802994 + ... + 26803035.

It is an arithmetic number, because the mean of its divisors is an integer number (214424120).

Almost surely, 2^1125726609 is an apocalyptic number.

It is an amenable number.

1125726609 is a deficient number, since it is larger than the sum of its proper divisors (589666351).

1125726609 is an equidigital number, since it uses as much as digits as its factorization.

1125726609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53606039.

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 1125726609 is about 33551.8495615368. The cubic root of 1125726609 is about 1040.2657755778.

The spelling of 1125726609 in words is "one billion, one hundred twenty-five million, seven hundred twenty-six thousand, six hundred nine".