1125309 has 4 divisors (see below), whose sum is σ = 1500416. Its totient is φ = 750204.

The previous prime is 1125283. The next prime is 1125317. The reversal of 1125309 is 9035211.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 1125309 - 2⁸ = 1125053 is a prime.

It is a D-number.

It is a Duffinian number.

1125309 is a lucky number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1125329) 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, 187549 + ... + 187554.

It is an arithmetic number, because the mean of its divisors is an integer number (375104).

2^1125309 is an apocalyptic number.

It is an amenable number.

1125309 is a deficient number, since it is larger than the sum of its proper divisors (375107).

1125309 is an equidigital number, since it uses as much as digits as its factorization.

1125309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375106.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 1125309 is about 1060.8058257759. The cubic root of 1125309 is about 104.0137124424.

The spelling of 1125309 in words is "one million, one hundred twenty-five thousand, three hundred nine".