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41821 = 133217
BaseRepresentation
bin1010001101011101
32010100221
422031131
52314241
6521341
7232633
oct121535
963327
1041821
112946a
1220251
1316060
1411353
15c5d1
hexa35d

41821 has 4 divisors (see below), whose sum is σ = 45052. Its totient is φ = 38592.

The previous prime is 41813. The next prime is 41843. The reversal of 41821 is 12814.

It is a happy number.

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 22500 + 19321 = 150^2 + 139^2 .

It is a cyclic number.

It is not a de Polignac number, because 41821 - 23 = 41813 is a prime.

It is the 205-th Hogben number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41795 and 41804.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41801) by changing a digit.

It is a nontrivial repunit in base 204.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1596 + ... + 1621.

It is an arithmetic number, because the mean of its divisors is an integer number (11263).

241821 is an apocalyptic number.

It is an amenable number.

41821 is a deficient number, since it is larger than the sum of its proper divisors (3231).

41821 is a wasteful number, since it uses less digits than its factorization.

41821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3230.

The product of its digits is 64, while the sum is 16.

The square root of 41821 is about 204.5018337326. The cubic root of 41821 is about 34.7108144806.

It can be divided in two parts, 418 and 21, that multiplied together give a palindrome (8778).

The spelling of 41821 in words is "forty-one thousand, eight hundred twenty-one".

Divisors: 1 13 3217 41821