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84261 = 328087
BaseRepresentation
bin10100100100100101
311021120210
4110210211
510144021
61450033
7500442
oct244445
9137523
1084261
1158341
1240919
132c478
14229c9
1519e76
hex14925

84261 has 4 divisors (see below), whose sum is σ = 112352. Its totient is φ = 56172.

The previous prime is 84247. The next prime is 84263. The reversal of 84261 is 16248.

84261 is nontrivially palindromic in base 2.

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 84261 - 25 = 84229 is a prime.

It is a super-2 number, since 2×842612 = 14199832242, which contains 22 as substring.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (84263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14041 + ... + 14046.

It is an arithmetic number, because the mean of its divisors is an integer number (28088).

284261 is an apocalyptic number.

It is an amenable number.

84261 is a deficient number, since it is larger than the sum of its proper divisors (28091).

84261 is a wasteful number, since it uses less digits than its factorization.

84261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28090.

The product of its digits is 384, while the sum is 21.

The square root of 84261 is about 290.2774534820. The cubic root of 84261 is about 43.8405038059.

It can be divided in two parts, 842 and 61, that added together give a triangular number (903 = T42).

The spelling of 84261 in words is "eighty-four thousand, two hundred sixty-one".

Divisors: 1 3 28087 84261