425581657 has 2 divisors, whose sum is σ = 425581658. Its totient is φ = 425581656.

The previous prime is 425581613. The next prime is 425581669. The reversal of 425581657 is 756185524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 347859801 + 77721856 = 18651^2 + 8816^2 .

It is a cyclic number.

It is not a de Polignac number, because 425581657 - 2¹⁵ = 425548889 is a prime.

It is a super-2 number, since 2×425581657² = 362239493549731298, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (425581687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212790828 + 212790829.

It is an arithmetic number, because the mean of its divisors is an integer number (212790829).

Almost surely, 2^425581657 is an apocalyptic number.

It is an amenable number.

425581657 is a deficient number, since it is larger than the sum of its proper divisors (1).

425581657 is an equidigital number, since it uses as much as digits as its factorization.

425581657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336000, while the sum is 43.

The square root of 425581657 is about 20629.6305589800. The cubic root of 425581657 is about 752.1901356638.

The spelling of 425581657 in words is "four hundred twenty-five million, five hundred eighty-one thousand, six hundred fifty-seven".