1125193409 has 8 divisors (see below), whose sum is σ = 1133747328. Its totient is φ = 1116657360.

The previous prime is 1125193403. The next prime is 1125193423. The reversal of 1125193409 is 9043915211.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 1125193409 - 2⁴ = 1125193393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1125193403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 139094 + ... + 146960.

It is an arithmetic number, because the mean of its divisors is an integer number (141718416).

Almost surely, 2^1125193409 is an apocalyptic number.

It is an amenable number.

1125193409 is a deficient number, since it is larger than the sum of its proper divisors (8553919).

1125193409 is an equidigital number, since it uses as much as digits as its factorization.

1125193409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8935.

The product of its (nonzero) digits is 9720, while the sum is 35.

The square root of 1125193409 is about 33543.9027097325. The cubic root of 1125193409 is about 1040.1015091377.

The spelling of 1125193409 in words is "one billion, one hundred twenty-five million, one hundred ninety-three thousand, four hundred nine".