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7285 = 53147
BaseRepresentation
bin1110001110101
3100222211
41301311
5213120
653421
730145
oct16165
910884
107285
115523
124271
133415
142925
15225a
hex1c75

7285 has 8 divisors (see below), whose sum is σ = 9216. Its totient is φ = 5520.

The previous prime is 7283. The next prime is 7297. The reversal of 7285 is 5827.

It can be divided in two parts, 7 and 285, that added together give a palindrome (292).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7285 - 21 = 7283 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132 + ... + 178.

It is an arithmetic number, because the mean of its divisors is an integer number (1152).

27285 is an apocalyptic number.

It is an amenable number.

7285 is a deficient number, since it is larger than the sum of its proper divisors (1931).

7285 is a wasteful number, since it uses less digits than its factorization.

7285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83.

The product of its digits is 560, while the sum is 22.

The square root of 7285 is about 85.3522114535. The cubic root of 7285 is about 19.3854782032.

The spelling of 7285 in words is "seven thousand, two hundred eighty-five".

Divisors: 1 5 31 47 155 235 1457 7285