425309 has 2 divisors, whose sum is σ = 425310. Its totient is φ = 425308.

The previous prime is 425297. The next prime is 425317. The reversal of 425309 is 903524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 422500 + 2809 = 650^2 + 53^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425309 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 (425329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212654 + 212655.

It is an arithmetic number, because the mean of its divisors is an integer number (212655).

2⁴²⁵³⁰⁹ is an apocalyptic number.

It is an amenable number.

425309 is a deficient number, since it is larger than the sum of its proper divisors (1).

425309 is an equidigital number, since it uses as much as digits as its factorization.

425309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 425309 is about 652.1571896407. The cubic root of 425309 is about 75.2029466365.

The spelling of 425309 in words is "four hundred twenty-five thousand, three hundred nine".