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6145 = 51229
BaseRepresentation
bin1100000000001
322102121
41200001
5144040
644241
723626
oct14001
98377
106145
114687
123681
132a49
14234d
151c4a
hex1801

6145 has 4 divisors (see below), whose sum is σ = 7380. Its totient is φ = 4912.

The previous prime is 6143. The next prime is 6151. The reversal of 6145 is 5416.

Subtracting from 6145 its reverse (5416), we obtain a 6-th power (729 = 36).

It can be divided in two parts, 6 and 145, that added together give a palindrome (151).

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 4624 + 1521 = 68^2 + 39^2 .

It is a cyclic number.

It is not a de Polignac number, because 6145 - 21 = 6143 is a prime.

It is a super-2 number, since 2×61452 = 75522050, which contains 22 as substring.

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

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (6143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (3) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 610 + ... + 619.

It is an arithmetic number, because the mean of its divisors is an integer number (1845).

6145 is a Friedman number, since it can be written as 6*4^5+1, using all its digits and the basic arithmetic operations.

It is a Proth number, since it is equal to 3 ⋅ 211 + 1 and 3 < 211.

It is an amenable number.

6145 is a deficient number, since it is larger than the sum of its proper divisors (1235).

6145 is a wasteful number, since it uses less digits than its factorization.

6145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1234.

The product of its digits is 120, while the sum is 16.

The square root of 6145 is about 78.3900503891. The cubic root of 6145 is about 18.3164215025.

The spelling of 6145 in words is "six thousand, one hundred forty-five".

Divisors: 1 5 1229 6145