425968421 has 2 divisors, whose sum is σ = 425968422. Its totient is φ = 425968420.

The previous prime is 425968351. The next prime is 425968423. The reversal of 425968421 is 124869524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425968321 + 100 = 20639^2 + 10^2 .

It is a cyclic number.

It is not a de Polignac number, because 425968421 - 2¹⁸ = 425706277 is a prime.

Together with 425968423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425968423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212984210 + 212984211.

It is an arithmetic number, because the mean of its divisors is an integer number (212984211).

Almost surely, 2^425968421 is an apocalyptic number.

It is an amenable number.

425968421 is a deficient number, since it is larger than the sum of its proper divisors (1).

425968421 is an equidigital number, since it uses as much as digits as its factorization.

425968421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 138240, while the sum is 41.

The square root of 425968421 is about 20639.0024225979. The cubic root of 425968421 is about 752.4179274220.

The spelling of 425968421 in words is "four hundred twenty-five million, nine hundred sixty-eight thousand, four hundred twenty-one".