2124509 has 2 divisors, whose sum is σ = 2124510. Its totient is φ = 2124508.

The previous prime is 2124491. The next prime is 2124517. The reversal of 2124509 is 9054212.

2124509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1898884 + 225625 = 1378^2 + 475^2 .

It is a cyclic number.

It is not a de Polignac number, because 2124509 - 2⁸ = 2124253 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 (2124589) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1062254 + 1062255.

It is an arithmetic number, because the mean of its divisors is an integer number (1062255).

2^2124509 is an apocalyptic number.

It is an amenable number.

2124509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2124509 is an equidigital number, since it uses as much as digits as its factorization.

2124509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 2124509 is about 1457.5695523713. The cubic root of 2124509 is about 128.5541768152.

The spelling of 2124509 in words is "two million, one hundred twenty-four thousand, five hundred nine".