2125009 has 2 divisors, whose sum is σ = 2125010. Its totient is φ = 2125008.

The previous prime is 2125001. The next prime is 2125037. The reversal of 2125009 is 9005212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1203409 + 921600 = 1097^2 + 960^2 .

It is a cyclic number.

It is not a de Polignac number, because 2125009 - 2³ = 2125001 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2125001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062504 + 1062505.

It is an arithmetic number, because the mean of its divisors is an integer number (1062505).

2^2125009 is an apocalyptic number.

It is an amenable number.

2125009 is a deficient number, since it is larger than the sum of its proper divisors (1).

2125009 is an equidigital number, since it uses as much as digits as its factorization.

2125009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 2125009 is about 1457.7410606826. The cubic root of 2125009 is about 128.5642610349.

The spelling of 2125009 in words is "two million, one hundred twenty-five thousand, nine".