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105641 = 149709
BaseRepresentation
bin11001110010101001
312100220122
4121302221
511340031
62133025
7616664
oct316251
9170818
10105641
1172408
1251175
1339113
142a6db
152147b
hex19ca9

105641 has 4 divisors (see below), whose sum is σ = 106500. Its totient is φ = 104784.

The previous prime is 105619. The next prime is 105649. The reversal of 105641 is 146501.

It is a happy number.

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: 146501 = 433407.

It can be written as a sum of positive squares in 2 ways, for example, as 13225 + 92416 = 115^2 + 304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-105641 is a prime.

It is a super-2 number, since 2×1056412 = 22320041762, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (105649) 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, 206 + ... + 503.

It is an arithmetic number, because the mean of its divisors is an integer number (26625).

2105641 is an apocalyptic number.

It is an amenable number.

105641 is a deficient number, since it is larger than the sum of its proper divisors (859).

105641 is an equidigital number, since it uses as much as digits as its factorization.

105641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 105641 is about 325.0246144525. The cubic root of 105641 is about 47.2727464362.

The spelling of 105641 in words is "one hundred five thousand, six hundred forty-one".

Divisors: 1 149 709 105641