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7149 = 32383
BaseRepresentation
bin1101111101101
3100210210
41233231
5212044
653033
726562
oct15755
910723
107149
11540a
124179
13333c
142869
1521b9
hex1bed

7149 has 4 divisors (see below), whose sum is σ = 9536. Its totient is φ = 4764.

The previous prime is 7129. The next prime is 7151. The reversal of 7149 is 9417.

7149 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 7149 - 29 = 6637 is a prime.

It is a super-2 number, since 2×71492 = 102216402, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 13.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 7149.

It is not an unprimeable number, because it can be changed into a prime (7109) 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, 1189 + ... + 1194.

It is an arithmetic number, because the mean of its divisors is an integer number (2384).

27149 is an apocalyptic number.

It is an amenable number.

7149 is a deficient number, since it is larger than the sum of its proper divisors (2387).

7149 is a wasteful number, since it uses less digits than its factorization.

It is an anagram of its base 12 representation: 7149 = (4179)12.

7149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2386.

The product of its digits is 252, while the sum is 21.

The square root of 7149 is about 84.5517592957. The cubic root of 7149 is about 19.2640870631.

It can be divided in two parts, 71 and 49, that added together give a triangular number (120 = T15).

The spelling of 7149 in words is "seven thousand, one hundred forty-nine".

Divisors: 1 3 2383 7149