425710921 has 2 divisors, whose sum is σ = 425710922. Its totient is φ = 425710920.

The previous prime is 425710907. The next prime is 425710927. The reversal of 425710921 is 129017524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347636025 + 78074896 = 18645^2 + 8836^2 .

It is a cyclic number.

It is not a de Polignac number, because 425710921 - 2¹¹ = 425708873 is a prime.

It is not a weakly prime, because it can be changed into another prime (425710927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212855460 + 212855461.

It is an arithmetic number, because the mean of its divisors is an integer number (212855461).

Almost surely, 2^425710921 is an apocalyptic number.

It is an amenable number.

425710921 is a deficient number, since it is larger than the sum of its proper divisors (1).

425710921 is an equidigital number, since it uses as much as digits as its factorization.

425710921 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 31.

The square root of 425710921 is about 20632.7632904563. The cubic root of 425710921 is about 752.2662834187.

The spelling of 425710921 in words is "four hundred twenty-five million, seven hundred ten thousand, nine hundred twenty-one".