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42985 = 58597
BaseRepresentation
bin1010011111101001
32011222001
422133221
52333420
6531001
7236215
oct123751
964861
1042985
112a328
1220a61
1316747
1411945
15cb0a
hexa7e9

42985 has 4 divisors (see below), whose sum is σ = 51588. Its totient is φ = 34384.

The previous prime is 42979. The next prime is 42989. The reversal of 42985 is 58924.

42985 = 612 + 622 + ... + 702.

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 23104 + 19881 = 152^2 + 141^2 .

It is a cyclic number.

It is not a de Polignac number, because 42985 - 25 = 42953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42989) 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, 4294 + ... + 4303.

It is an arithmetic number, because the mean of its divisors is an integer number (12897).

242985 is an apocalyptic number.

It is an amenable number.

42985 is a deficient number, since it is larger than the sum of its proper divisors (8603).

42985 is an equidigital number, since it uses as much as digits as its factorization.

42985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8602.

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

The square root of 42985 is about 207.3282421669. The cubic root of 42985 is about 35.0299064114.

The spelling of 42985 in words is "forty-two thousand, nine hundred eighty-five".

Divisors: 1 5 8597 42985