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47145 = 357449
BaseRepresentation
bin1011100000101001
32101200010
423200221
53002040
61002133
7254310
oct134051
971603
1047145
113246a
1223349
13185c7
1413277
15de80
hexb829

47145 has 16 divisors (see below), whose sum is σ = 86400. Its totient is φ = 21504.

The previous prime is 47143. The next prime is 47147. The reversal of 47145 is 54174.

It is an interprime number because it is at equal distance from previous prime (47143) and next prime (47147).

It is not a de Polignac number, because 47145 - 21 = 47143 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Curzon number.

It is a plaindrome in base 12.

It is not an unprimeable number, because it can be changed into a prime (47143) 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 15 ways as a sum of consecutive naturals, for example, 120 + ... + 329.

It is an arithmetic number, because the mean of its divisors is an integer number (5400).

247145 is an apocalyptic number.

It is an amenable number.

47145 is a deficient number, since it is larger than the sum of its proper divisors (39255).

47145 is a wasteful number, since it uses less digits than its factorization.

47145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464.

The product of its digits is 560, while the sum is 21.

The square root of 47145 is about 217.1289939184. The cubic root of 47145 is about 36.1253347430.

The spelling of 47145 in words is "forty-seven thousand, one hundred forty-five".