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285701 = 1321977
BaseRepresentation
bin1000101110000000101
3112111220112
41011300011
533120301
610042405
72266643
oct1056005
9474815
10285701
11185719
12119405
13a0070
1476193
15599bb
hex45c05

285701 has 4 divisors (see below), whose sum is σ = 307692. Its totient is φ = 263712.

The previous prime is 285697. The next prime is 285707. The reversal of 285701 is 107582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 107582 = 253791.

It can be written as a sum of positive squares in 2 ways, for example, as 84100 + 201601 = 290^2 + 449^2 .

It is a cyclic number.

It is not a de Polignac number, because 285701 - 22 = 285697 is a prime.

It is a super-2 number, since 2×2857012 = 163250122802, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 15.

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 285701.

It is not an unprimeable number, because it can be changed into a prime (285707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10976 + ... + 11001.

It is an arithmetic number, because the mean of its divisors is an integer number (76923).

2285701 is an apocalyptic number.

It is an amenable number.

285701 is a deficient number, since it is larger than the sum of its proper divisors (21991).

285701 is a wasteful number, since it uses less digits than its factorization.

285701 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21990.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 285701 is about 534.5100560326. The cubic root of 285701 is about 65.8623547027.

The spelling of 285701 in words is "two hundred eighty-five thousand, seven hundred one".

Divisors: 1 13 21977 285701