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285229 = 725821
BaseRepresentation
bin1000101101000101101
3112111021001
41011220231
533111404
610040301
72265400
oct1055055
9474231
10285229
1118532a
12119091
139ca99
1475d37
15597a4
hex45a2d

285229 has 6 divisors (see below), whose sum is σ = 331854. Its totient is φ = 244440.

The previous prime is 285227. The next prime is 285251. The reversal of 285229 is 922582.

It can be written as a sum of positive squares in only one way, i.e., 275625 + 9604 = 525^2 + 98^2 .

It is not a de Polignac number, because 285229 - 21 = 285227 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285197 and 285206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285221) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2862 + ... + 2959.

It is an arithmetic number, because the mean of its divisors is an integer number (55309).

2285229 is an apocalyptic number.

It is an amenable number.

285229 is a deficient number, since it is larger than the sum of its proper divisors (46625).

285229 is an equidigital number, since it uses as much as digits as its factorization.

285229 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835 (or 5828 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 285229 is about 534.0683476859. The cubic root of 285229 is about 65.8260648209.

The spelling of 285229 in words is "two hundred eighty-five thousand, two hundred twenty-nine".

Divisors: 1 7 49 5821 40747 285229