425426681 has 2 divisors, whose sum is σ = 425426682. Its totient is φ = 425426680.

The previous prime is 425426669. The next prime is 425426719. The reversal of 425426681 is 186624524.

It is an a-pointer prime, because the next prime (425426719) can be obtained adding 425426681 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 214915600 + 210511081 = 14660^2 + 14509^2 .

It is a cyclic number.

It is not a de Polignac number, because 425426681 - 2¹⁰ = 425425657 is a prime.

It is a super-2 number, since 2×425426681² = 361975721813351522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (425426611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212713340 + 212713341.

It is an arithmetic number, because the mean of its divisors is an integer number (212713341).

Almost surely, 2^425426681 is an apocalyptic number.

It is an amenable number.

425426681 is a deficient number, since it is larger than the sum of its proper divisors (1).

425426681 is an equidigital number, since it uses as much as digits as its factorization.

425426681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 92160, while the sum is 38.

The square root of 425426681 is about 20625.8740663275. The cubic root of 425426681 is about 752.0988209738.

The spelling of 425426681 in words is "four hundred twenty-five million, four hundred twenty-six thousand, six hundred eighty-one".