285101 has 2 divisors, whose sum is σ = 285102. Its totient is φ = 285100.

The previous prime is 285091. The next prime is 285113. The reversal of 285101 is 101582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 249001 + 36100 = 499^2 + 190^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-285101 is a prime.

It is a plaindrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 285101.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 285101.

It is not a weakly prime, because it can be changed into another prime (285121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 142550 + 142551.

It is an arithmetic number, because the mean of its divisors is an integer number (142551).

2²⁸⁵¹⁰¹ is an apocalyptic number.

It is an amenable number.

285101 is a deficient number, since it is larger than the sum of its proper divisors (1).

285101 is an equidigital number, since it uses as much as digits as its factorization.

285101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 285101 is about 533.9484993892. The cubic root of 285101 is about 65.8162165972.

Adding to 285101 its reverse (101582), we get a palindrome (386683).

The spelling of 285101 in words is "two hundred eighty-five thousand, one hundred one".