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286481 = 1322037
BaseRepresentation
bin1000101111100010001
3112112222102
41011330101
533131411
610050145
72302136
oct1057421
9475872
10286481
11186268
12119955
13a0520
147658d
1559d3b
hex45f11

286481 has 4 divisors (see below), whose sum is σ = 308532. Its totient is φ = 264432.

The previous prime is 286477. The next prime is 286483. The reversal of 286481 is 184682.

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 36481 + 250000 = 191^2 + 500^2 .

It is a cyclic number.

It is not a de Polignac number, because 286481 - 22 = 286477 is a prime.

It is a super-2 number, since 2×2864812 = 164142726722, which contains 22 as substring.

It is a Duffinian number.

286481 is a modest number, since divided by 481 gives 286 as remainder.

It is a Curzon number.

It is a zygodrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 286481.

It is not an unprimeable number, because it can be changed into a prime (286483) 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, 11006 + ... + 11031.

It is an arithmetic number, because the mean of its divisors is an integer number (77133).

2286481 is an apocalyptic number.

It is an amenable number.

286481 is a deficient number, since it is larger than the sum of its proper divisors (22051).

286481 is a wasteful number, since it uses less digits than its factorization.

286481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22050.

The product of its digits is 3072, while the sum is 29.

The square root of 286481 is about 535.2391988635. The cubic root of 286481 is about 65.9222377695.

It can be divided in two parts, 286 and 481, that added together give a palindrome (767).

The spelling of 286481 in words is "two hundred eighty-six thousand, four hundred eighty-one".

Divisors: 1 13 22037 286481