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BaseRepresentation
bin100101011001001
3222021002
410223021
51103040
6224345
7106550
oct45311
928232
1019145
1113425
12b0b5
138939
146d97
155a15
hex4ac9

19145 has 8 divisors (see below), whose sum is σ = 26304. Its totient is φ = 13104.

The previous prime is 19141. The next prime is 19157. The reversal of 19145 is 54191.

19145 = T14 + T15 + ... + T48.

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

It is not a de Polignac number, because 19145 - 22 = 19141 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19141) 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, 239 + ... + 308.

It is an arithmetic number, because the mean of its divisors is an integer number (3288).

219145 is an apocalyptic number.

It is an amenable number.

19145 is a deficient number, since it is larger than the sum of its proper divisors (7159).

19145 is an equidigital number, since it uses as much as digits as its factorization.

19145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 559.

The product of its digits is 180, while the sum is 20.

The square root of 19145 is about 138.3654581173. The cubic root of 19145 is about 26.7517249303.

The spelling of 19145 in words is "nineteen thousand, one hundred forty-five".

Divisors: 1 5 7 35 547 2735 3829 19145