285212657 has 2 divisors, whose sum is σ = 285212658. Its totient is φ = 285212656.

The previous prime is 285212639. The next prime is 285212659. The reversal of 285212657 is 756212582.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 243235216 + 41977441 = 15596^2 + 6479^2 .

It is a cyclic number.

It is not a de Polignac number, because 285212657 - 2¹⁴ = 285196273 is a prime.

Together with 285212659, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 285212657.

It is not a weakly prime, because it can be changed into another prime (285212659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142606328 + 142606329.

It is an arithmetic number, because the mean of its divisors is an integer number (142606329).

Almost surely, 2^285212657 is an apocalyptic number.

It is an amenable number.

285212657 is a deficient number, since it is larger than the sum of its proper divisors (1).

285212657 is an equidigital number, since it uses as much as digits as its factorization.

285212657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 67200, while the sum is 38.

The square root of 285212657 is about 16888.2401984339. The cubic root of 285212657 is about 658.2480756689.

The spelling of 285212657 in words is "two hundred eighty-five million, two hundred twelve thousand, six hundred fifty-seven".