426856321 has 2 divisors, whose sum is σ = 426856322. Its totient is φ = 426856320.

The previous prime is 426856319. The next prime is 426856343. The reversal of 426856321 is 123658624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396209025 + 30647296 = 19905^2 + 5536^2 .

It is a cyclic number.

It is not a de Polignac number, because 426856321 - 2¹ = 426856319 is a prime.

It is a super-3 number, since 3×426856321³ (a number of 27 digits) contains 333 as substring.

Together with 426856319, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (426856721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213428160 + 213428161.

It is an arithmetic number, because the mean of its divisors is an integer number (213428161).

Almost surely, 2^426856321 is an apocalyptic number.

It is an amenable number.

426856321 is a deficient number, since it is larger than the sum of its proper divisors (1).

426856321 is an equidigital number, since it uses as much as digits as its factorization.

426856321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 37.

The square root of 426856321 is about 20660.5014701967. The cubic root of 426856321 is about 752.9403513070.

The spelling of 426856321 in words is "four hundred twenty-six million, eight hundred fifty-six thousand, three hundred twenty-one".