85266257 has 2 divisors, whose sum is σ = 85266258. Its totient is φ = 85266256.

The previous prime is 85266253. The next prime is 85266289. The reversal of 85266257 is 75266258.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 66569281 + 18696976 = 8159^2 + 4324^2 .

It is a cyclic number.

It is not a de Polignac number, because 85266257 - 2² = 85266253 is a prime.

It is not a weakly prime, because it can be changed into another prime (85266253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42633128 + 42633129.

It is an arithmetic number, because the mean of its divisors is an integer number (42633129).

Almost surely, 2^85266257 is an apocalyptic number.

It is an amenable number.

85266257 is a deficient number, since it is larger than the sum of its proper divisors (1).

85266257 is an equidigital number, since it uses as much as digits as its factorization.

85266257 is an evil number, because the sum of its binary digits is even.

The product of its digits is 201600, while the sum is 41.

The square root of 85266257 is about 9233.9729802507. The cubic root of 85266257 is about 440.1415815037.

Subtracting from 85266257 its reverse (75266258), we obtain a palindrome (9999999).

The spelling of 85266257 in words is "eighty-five million, two hundred sixty-six thousand, two hundred fifty-seven".