285457 has 2 divisors, whose sum is σ = 285458. Its totient is φ = 285456.

The previous prime is 285451. The next prime is 285463. The reversal of 285457 is 754582.

It is a balanced prime because it is at equal distance from previous prime (285451) and next prime (285463).

It can be written as a sum of positive squares in only one way, i.e., 261121 + 24336 = 511^2 + 156^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285457 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (285451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142728 + 142729.

It is an arithmetic number, because the mean of its divisors is an integer number (142729).

2²⁸⁵⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

285457 is a deficient number, since it is larger than the sum of its proper divisors (1).

285457 is an equidigital number, since it uses as much as digits as its factorization.

285457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11200, while the sum is 31.

The square root of 285457 is about 534.2817608715. The cubic root of 285457 is about 65.8435996737.

The spelling of 285457 in words is "two hundred eighty-five thousand, four hundred fifty-seven".