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7124 = 2213137
BaseRepresentation
bin1101111010100
3100202212
41233110
5211444
652552
726525
oct15724
910685
107124
115397
124158
133320
14284c
15219e
hex1bd4

7124 has 12 divisors (see below), whose sum is σ = 13524. Its totient is φ = 3264.

The previous prime is 7121. The next prime is 7127. The reversal of 7124 is 4217.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7121) and next prime (7127).

It can be written as a sum of positive squares in 2 ways, for example, as 2500 + 4624 = 50^2 + 68^2 .

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 7099 and 7108.

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 polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 120.

It is an arithmetic number, because the mean of its divisors is an integer number (1127).

27124 is an apocalyptic number.

It is an amenable number.

7124 is a deficient number, since it is larger than the sum of its proper divisors (6400).

7124 is a wasteful number, since it uses less digits than its factorization.

7124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154 (or 152 counting only the distinct ones).

The product of its digits is 56, while the sum is 14.

The square root of 7124 is about 84.4037913840. The cubic root of 7124 is about 19.2416053801.

It can be divided in two parts, 7 and 124, that multiplied together give a palindrome (868).

The spelling of 7124 in words is "seven thousand, one hundred twenty-four", and thus it is an iban number.

Divisors: 1 2 4 13 26 52 137 274 548 1781 3562 7124