2509123 has 2 divisors, whose sum is σ = 2509124. Its totient is φ = 2509122.

The previous prime is 2509103. The next prime is 2509127. The reversal of 2509123 is 3219052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2509123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2509094 and 2509103.

It is not a weakly prime, because it can be changed into another prime (2509127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1254561 + 1254562.

It is an arithmetic number, because the mean of its divisors is an integer number (1254562).

2^2509123 is an apocalyptic number.

2509123 is a deficient number, since it is larger than the sum of its proper divisors (1).

2509123 is an equidigital number, since it uses as much as digits as its factorization.

2509123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 540, while the sum is 22.

The square root of 2509123 is about 1584.0211488487. The cubic root of 2509123 is about 135.8857712988.

The spelling of 2509123 in words is "two million, five hundred nine thousand, one hundred twenty-three".