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74185 = 537401
BaseRepresentation
bin10010000111001001
310202202121
4102013021
54333220
61331241
7426166
oct220711
9122677
1074185
1150811
1236b21
13279c7
141d06d
1516eaa
hex121c9

74185 has 8 divisors (see below), whose sum is σ = 91656. Its totient is φ = 57600.

The previous prime is 74177. The next prime is 74189. The reversal of 74185 is 58147.

It can be written as a sum of positive squares in 4 ways, for example, as 44944 + 29241 = 212^2 + 171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 74185 - 23 = 74177 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a plaindrome in base 9.

It is a nialpdrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (74189) 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 7 ways as a sum of consecutive naturals, for example, 16 + ... + 385.

It is an arithmetic number, because the mean of its divisors is an integer number (11457).

274185 is an apocalyptic number.

It is an amenable number.

74185 is a deficient number, since it is larger than the sum of its proper divisors (17471).

74185 is a wasteful number, since it uses less digits than its factorization.

74185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443.

The product of its digits is 1120, while the sum is 25.

The square root of 74185 is about 272.3692346797. The cubic root of 74185 is about 42.0183215605.

The spelling of 74185 in words is "seventy-four thousand, one hundred eighty-five".

Divisors: 1 5 37 185 401 2005 14837 74185