1125888509 has 2 divisors, whose sum is σ = 1125888510. Its totient is φ = 1125888508.

The previous prime is 1125888493. The next prime is 1125888527. The reversal of 1125888509 is 9058885211.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 888636100 + 237252409 = 29810^2 + 15403^2 .

It is an emirp because it is prime and its reverse (9058885211) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1125888509 - 2⁴ = 1125888493 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1125888559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 562944254 + 562944255.

It is an arithmetic number, because the mean of its divisors is an integer number (562944255).

Almost surely, 2^1125888509 is an apocalyptic number.

It is an amenable number.

1125888509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1125888509 is an equidigital number, since it uses as much as digits as its factorization.

1125888509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 230400, while the sum is 47.

The square root of 1125888509 is about 33554.2621584800. The cubic root of 1125888509 is about 1040.3156429122.

The spelling of 1125888509 in words is "one billion, one hundred twenty-five million, eight hundred eighty-eight thousand, five hundred nine".