425000921 has 2 divisors, whose sum is σ = 425000922. Its totient is φ = 425000920.

The previous prime is 425000909. The next prime is 425001001. The reversal of 425000921 is 129000524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 374035600 + 50965321 = 19340^2 + 7139^2 .

It is a cyclic number.

It is not a de Polignac number, because 425000921 - 2⁶ = 425000857 is a prime.

It is not a weakly prime, because it can be changed into another prime (425000321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212500460 + 212500461.

It is an arithmetic number, because the mean of its divisors is an integer number (212500461).

Almost surely, 2^425000921 is an apocalyptic number.

It is an amenable number.

425000921 is a deficient number, since it is larger than the sum of its proper divisors (1).

425000921 is an equidigital number, since it uses as much as digits as its factorization.

425000921 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 425000921 is about 20615.5504656073. The cubic root of 425000921 is about 751.8478412012.

The spelling of 425000921 in words is "four hundred twenty-five million, nine hundred twenty-one", and thus it is an aban number.