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42845 = 5111941
BaseRepresentation
bin1010011101011101
32011202212
422131131
52332340
6530205
7235625
oct123535
964685
1042845
112a210
1220965
131666a
1411885
15ca65
hexa75d

42845 has 16 divisors (see below), whose sum is σ = 60480. Its totient is φ = 28800.

The previous prime is 42841. The next prime is 42853. The reversal of 42845 is 54824.

It is not a de Polignac number, because 42845 - 22 = 42841 is a prime.

It is a Curzon number.

It is a plaindrome in base 13.

It is a nialpdrome in base 15.

It is a self number, because there is not a number n which added to its sum of digits gives 42845.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42841) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1025 + ... + 1065.

It is an arithmetic number, because the mean of its divisors is an integer number (3780).

242845 is an apocalyptic number.

It is an amenable number.

42845 is a deficient number, since it is larger than the sum of its proper divisors (17635).

42845 is a wasteful number, since it uses less digits than its factorization.

42845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76.

The product of its digits is 1280, while the sum is 23.

The square root of 42845 is about 206.9903379388. The cubic root of 42845 is about 34.9918348300.

The spelling of 42845 in words is "forty-two thousand, eight hundred forty-five".

Divisors: 1 5 11 19 41 55 95 205 209 451 779 1045 2255 3895 8569 42845