425084509 has 2 divisors, whose sum is σ = 425084510. Its totient is φ = 425084508.

The previous prime is 425084503. The next prime is 425084563. The reversal of 425084509 is 905480524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 419348484 + 5736025 = 20478^2 + 2395^2 .

It is a cyclic number.

It is not a de Polignac number, because 425084509 - 2¹¹ = 425082461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425084503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212542254 + 212542255.

It is an arithmetic number, because the mean of its divisors is an integer number (212542255).

Almost surely, 2^425084509 is an apocalyptic number.

It is an amenable number.

425084509 is a deficient number, since it is larger than the sum of its proper divisors (1).

425084509 is an equidigital number, since it uses as much as digits as its factorization.

425084509 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57600, while the sum is 37.

The square root of 425084509 is about 20617.5776705218. The cubic root of 425084509 is about 751.8971284181.

The spelling of 425084509 in words is "four hundred twenty-five million, eighty-four thousand, five hundred nine".