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7141 = 37193
BaseRepresentation
bin1101111100101
3100210111
41233211
5212031
653021
726551
oct15745
910714
107141
115402
124171
133334
142861
1521b1
hex1be5

7141 has 4 divisors (see below), whose sum is σ = 7372. Its totient is φ = 6912.

The previous prime is 7129. The next prime is 7151. The reversal of 7141 is 1417.

It is the 35-th star number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1417 = 13109.

It can be written as a sum of positive squares in 2 ways, for example, as 4225 + 2916 = 65^2 + 54^2 .

It is a 4-Lehmer number, since φ(7141) divides (7141-1)4.

It is a cyclic number.

It is not a de Polignac number, because 7141 - 25 = 7109 is a prime.

It is the 85-th Hogben number.

It is a pancake number, because a pancake can be divided into 7141 parts by 119 straight cuts.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7121) by changing a digit.

It is a nontrivial repunit in base 84.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60 + ... + 133.

It is an arithmetic number, because the mean of its divisors is an integer number (1843).

27141 is an apocalyptic number.

It is an amenable number.

7141 is a deficient number, since it is larger than the sum of its proper divisors (231).

7141 is a wasteful number, since it uses less digits than its factorization.

7141 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its digits is 28, while the sum is 13.

The square root of 7141 is about 84.5044377533. The cubic root of 7141 is about 19.2568986350.

The spelling of 7141 in words is "seven thousand, one hundred forty-one", and is thus an iban number.

Divisors: 1 37 193 7141