420125009 has 2 divisors, whose sum is σ = 420125010. Its totient is φ = 420125008.

The previous prime is 420124981. The next prime is 420125033. The reversal of 420125009 is 900521024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 296803984 + 123321025 = 17228^2 + 11105^2 .

It is a cyclic number.

It is not a de Polignac number, because 420125009 - 2⁸ = 420124753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420125039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210062504 + 210062505.

It is an arithmetic number, because the mean of its divisors is an integer number (210062505).

Almost surely, 2^420125009 is an apocalyptic number.

It is an amenable number.

420125009 is a deficient number, since it is larger than the sum of its proper divisors (1).

420125009 is an equidigital number, since it uses as much as digits as its factorization.

420125009 is an evil number, because the sum of its binary digits is even.

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

The square root of 420125009 is about 20496.9512123145. The cubic root of 420125009 is about 748.9615310697.

The spelling of 420125009 in words is "four hundred twenty million, one hundred twenty-five thousand, nine".