1125509 has 16 divisors (see below), whose sum is σ = 1437696. Its totient is φ = 855600.

The previous prime is 1125499. The next prime is 1125529. The reversal of 1125509 is 9055211.

It is a cyclic number.

It is not a de Polignac number, because 1125509 - 2⁸ = 1125253 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 (1125529) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3464 + ... + 3774.

It is an arithmetic number, because the mean of its divisors is an integer number (89856).

2^1125509 is an apocalyptic number.

It is an amenable number.

1125509 is a deficient number, since it is larger than the sum of its proper divisors (312187).

1125509 is a wasteful number, since it uses less digits than its factorization.

1125509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 1125509 is about 1060.9000895466. The cubic root of 1125509 is about 104.0198741604.

The spelling of 1125509 in words is "one million, one hundred twenty-five thousand, five hundred nine".