1260509 has 2 divisors, whose sum is σ = 1260510. Its totient is φ = 1260508.

The previous prime is 1260487. The next prime is 1260541. The reversal of 1260509 is 9050621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 727609 + 532900 = 853^2 + 730^2 .

It is a cyclic number.

It is not a de Polignac number, because 1260509 - 2²⁰ = 211933 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1260569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 630254 + 630255.

It is an arithmetic number, because the mean of its divisors is an integer number (630255).

2^1260509 is an apocalyptic number.

It is an amenable number.

1260509 is a deficient number, since it is larger than the sum of its proper divisors (1).

1260509 is an equidigital number, since it uses as much as digits as its factorization.

1260509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 540, while the sum is 23.

The square root of 1260509 is about 1122.7239197594. The cubic root of 1260509 is about 108.0227718329.

The spelling of 1260509 in words is "one million, two hundred sixty thousand, five hundred nine".