425999257 has 2 divisors, whose sum is σ = 425999258. Its totient is φ = 425999256.

The previous prime is 425999227. The next prime is 425999269. The reversal of 425999257 is 752999524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 269649241 + 156350016 = 16421^2 + 12504^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-425999257 is a prime.

It is not a weakly prime, because it can be changed into another prime (425999227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212999628 + 212999629.

It is an arithmetic number, because the mean of its divisors is an integer number (212999629).

Almost surely, 2^425999257 is an apocalyptic number.

It is an amenable number.

425999257 is a deficient number, since it is larger than the sum of its proper divisors (1).

425999257 is an equidigital number, since it uses as much as digits as its factorization.

425999257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2041200, while the sum is 52.

The square root of 425999257 is about 20639.7494413086. The cubic root of 425999257 is about 752.4360829145.

The spelling of 425999257 in words is "four hundred twenty-five million, nine hundred ninety-nine thousand, two hundred fifty-seven".