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4247 = 31137
BaseRepresentation
bin1000010010111
312211022
41002113
5113442
631355
715245
oct10227
95738
104247
113211
12255b
131c19
141795
1513d2
hex1097

4247 has 4 divisors (see below), whose sum is σ = 4416. Its totient is φ = 4080.

The previous prime is 4243. The next prime is 4253. The reversal of 4247 is 7424.

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

It is a cyclic number.

It is not a de Polignac number, because 4247 - 22 = 4243 is a prime.

It is a magnanimous number.

It is a d-powerful number, because it can be written as 42 + 46 + 27 + 7 .

It is a Duffinian number.

It is a plaindrome in base 12.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4241) 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, 38 + ... + 99.

It is an arithmetic number, because the mean of its divisors is an integer number (1104).

24247 is an apocalyptic number.

4247 is a deficient number, since it is larger than the sum of its proper divisors (169).

4247 is a wasteful number, since it uses less digits than its factorization.

4247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168.

The product of its digits is 224, while the sum is 17.

The square root of 4247 is about 65.1690110405. The cubic root of 4247 is about 16.1942468013.

The spelling of 4247 in words is "four thousand, two hundred forty-seven", and thus it is an iban number.

Divisors: 1 31 137 4247