168285257 has 12 divisors (see below), whose sum is σ = 196061076. Its totient is φ = 144023040.

The previous prime is 168285253. The next prime is 168285263. The reversal of 168285257 is 752582861.

It can be written as a sum of positive squares in 2 ways, for example, as 219961 + 168065296 = 469^2 + 12964^2 .

It is not a de Polignac number, because 168285257 - 2² = 168285253 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (168285251) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35033 + ... + 39545.

It is an arithmetic number, because the mean of its divisors is an integer number (16338423).

Almost surely, 2^168285257 is an apocalyptic number.

It is an amenable number.

168285257 is a deficient number, since it is larger than the sum of its proper divisors (27775819).

168285257 is an equidigital number, since it uses as much as digits as its factorization.

168285257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5288 (or 5281 counting only the distinct ones).

The product of its digits is 268800, while the sum is 44.

The square root of 168285257 is about 12972.4807573571. The cubic root of 168285257 is about 552.0969612370.

The spelling of 168285257 in words is "one hundred sixty-eight million, two hundred eighty-five thousand, two hundred fifty-seven".