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155985 = 3510399
BaseRepresentation
bin100110000101010001
321220222020
4212011101
514442420
63202053
71216524
oct460521
9256866
10155985
11a7215
1276329
1355ccb
1440bbb
1531340
hex26151

155985 has 8 divisors (see below), whose sum is σ = 249600. Its totient is φ = 83184.

The previous prime is 155921. The next prime is 156007. The reversal of 155985 is 589551.

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

It is not a de Polignac number, because 155985 - 26 = 155921 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 5185 + ... + 5214.

It is an arithmetic number, because the mean of its divisors is an integer number (31200).

2155985 is an apocalyptic number.

155985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

155985 is a deficient number, since it is larger than the sum of its proper divisors (93615).

155985 is a wasteful number, since it uses less digits than its factorization.

155985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10407.

The product of its digits is 9000, while the sum is 33.

The square root of 155985 is about 394.9493638430. The cubic root of 155985 is about 53.8304006769.

The spelling of 155985 in words is "one hundred fifty-five thousand, nine hundred eighty-five".

Divisors: 1 3 5 15 10399 31197 51995 155985