986257 has 2 divisors, whose sum is σ = 986258. Its totient is φ = 986256.

The previous prime is 986239. The next prime is 986267. The reversal of 986257 is 752689.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 654481 + 331776 = 809^2 + 576^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-986257 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (986207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 493128 + 493129.

It is an arithmetic number, because the mean of its divisors is an integer number (493129).

2⁹⁸⁶²⁵⁷ is an apocalyptic number.

It is an amenable number.

986257 is a deficient number, since it is larger than the sum of its proper divisors (1).

986257 is an equidigital number, since it uses as much as digits as its factorization.

986257 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 37.

The square root of 986257 is about 993.1047276093. The cubic root of 986257 is about 99.5397852731.

The spelling of 986257 in words is "nine hundred eighty-six thousand, two hundred fifty-seven".