425891761 has 2 divisors, whose sum is σ = 425891762. Its totient is φ = 425891760.

The previous prime is 425891747. The next prime is 425891771. The reversal of 425891761 is 167198524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 352275361 + 73616400 = 18769^2 + 8580^2 .

It is a cyclic number.

It is not a de Polignac number, because 425891761 - 2¹¹ = 425889713 is a prime.

It is a super-2 number, since 2×425891761² = 362767584175362242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425891771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212945880 + 212945881.

It is an arithmetic number, because the mean of its divisors is an integer number (212945881).

Almost surely, 2^425891761 is an apocalyptic number.

It is an amenable number.

425891761 is a deficient number, since it is larger than the sum of its proper divisors (1).

425891761 is an equidigital number, since it uses as much as digits as its factorization.

425891761 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The square root of 425891761 is about 20637.1451756293. The cubic root of 425891761 is about 752.3727880674.

The spelling of 425891761 in words is "four hundred twenty-five million, eight hundred ninety-one thousand, seven hundred sixty-one".