2130509 has 2 divisors, whose sum is σ = 2130510. Its totient is φ = 2130508.

The previous prime is 2130503. The next prime is 2130523. The reversal of 2130509 is 9050312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1525225 + 605284 = 1235^2 + 778^2 .

It is a cyclic number.

It is not a de Polignac number, because 2130509 - 2⁴ = 2130493 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2130503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1065254 + 1065255.

It is an arithmetic number, because the mean of its divisors is an integer number (1065255).

2^2130509 is an apocalyptic number.

It is an amenable number.

2130509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2130509 is an equidigital number, since it uses as much as digits as its factorization.

2130509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 2130509 is about 1459.6263220427. The cubic root of 2130509 is about 128.6750831952.

The spelling of 2130509 in words is "two million, one hundred thirty thousand, five hundred nine".