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7288241 = 23813061
BaseRepresentation
bin11011110011010110110001
3111201021120212
4123303112301
53331210431
6420113505
7115643342
oct33632661
914637525
107288241
114128844
122535895
13168248c
14d7a0c9
1598e72b
hex6f35b1

7288241 has 4 divisors (see below), whose sum is σ = 7293684. Its totient is φ = 7282800.

The previous prime is 7288231. The next prime is 7288271. The reversal of 7288241 is 1428827.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1428827 = 5326959.

It can be written as a sum of positive squares in 2 ways, for example, as 2961841 + 4326400 = 1721^2 + 2080^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-7288241 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7288198 and 7288207.

It is not an unprimeable number, because it can be changed into a prime (7288231) 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, 851 + ... + 3911.

It is an arithmetic number, because the mean of its divisors is an integer number (1823421).

Almost surely, 27288241 is an apocalyptic number.

It is an amenable number.

7288241 is a deficient number, since it is larger than the sum of its proper divisors (5443).

7288241 is a wasteful number, since it uses less digits than its factorization.

7288241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5442.

The product of its digits is 7168, while the sum is 32.

The square root of 7288241 is about 2699.6742396074. The cubic root of 7288241 is about 193.8835255783.

The spelling of 7288241 in words is "seven million, two hundred eighty-eight thousand, two hundred forty-one".

Divisors: 1 2381 3061 7288241