Search a number
4985 = 5997
BaseRepresentation
bin1001101111001
320211122
41031321
5124420
635025
720351
oct11571
96748
104985
113822
122a75
132366
141b61
151725
hex1379

4985 has 4 divisors (see below), whose sum is σ = 5988. Its totient is φ = 3984.

The previous prime is 4973. The next prime is 4987. The reversal of 4985 is 5894.

Subtracting 4985 from its reverse (5894), we obtain a palindrome (909).

It can be divided in two parts, 4 and 985, that added together give a palindrome (989).

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3136 + 1849 = 56^2 + 43^2 .

It is a cyclic number.

It is not a de Polignac number, because 4985 - 24 = 4969 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 13 and base 16.

It is not an unprimeable number, because it can be changed into a prime (4987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 494 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (1497).

24985 is an apocalyptic number.

It is an amenable number.

4985 is a deficient number, since it is larger than the sum of its proper divisors (1003).

4985 is an equidigital number, since it uses as much as digits as its factorization.

4985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1002.

The product of its digits is 1440, while the sum is 26.

The square root of 4985 is about 70.6045324324. The cubic root of 4985 is about 17.0826425790.

The spelling of 4985 in words is "four thousand, nine hundred eighty-five".

Divisors: 1 5 997 4985