1165425409 has 2 divisors, whose sum is σ = 1165425410. Its totient is φ = 1165425408.

The previous prime is 1165425397. The next prime is 1165425419. The reversal of 1165425409 is 9045245611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1152263025 + 13162384 = 33945^2 + 3628^2 .

It is a cyclic number.

It is not a de Polignac number, because 1165425409 - 2⁷ = 1165425281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1165425419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 582712704 + 582712705.

It is an arithmetic number, because the mean of its divisors is an integer number (582712705).

Almost surely, 2^1165425409 is an apocalyptic number.

It is an amenable number.

1165425409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1165425409 is an equidigital number, since it uses as much as digits as its factorization.

1165425409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 1165425409 is about 34138.3275659485. The cubic root of 1165425409 is about 1052.3531228513.

The spelling of 1165425409 in words is "one billion, one hundred sixty-five million, four hundred twenty-five thousand, four hundred nine".