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1485 = 33511
BaseRepresentation
bin10111001101
32001000
4113031
521420
610513
74221
oct2715
92030
101485
111130
12a39
138a3
14781
15690
hex5cd

1485 has 16 divisors (see below), whose sum is σ = 2880. Its totient is φ = 720.

The previous prime is 1483. The next prime is 1487. The reversal of 1485 is 5841.

Subtracting 1485 from its reverse (5841), we obtain a square (4356 = 662).

It can be divided in two parts, 148 and 5, that added together give a triangular number (153 = T17).

1485 = T12 + T13 + ... + T21.

1485 is a nontrivial binomial coefficient, being equal to C(55, 2).

It is an interprime number because it is at equal distance from previous prime (1483) and next prime (1487).

It is not a de Polignac number, because 1485 - 21 = 1483 is a prime.

It is a Curzon number.

1485 is a lucky number.

It is a plaindrome in base 16.

It is a nialpdrome in base 7.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1481) 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, 130 + ... + 140.

It is an arithmetic number, because the mean of its divisors is an integer number (180).

21485 is an apocalyptic number.

1485 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1485 is the 54-th triangular number.

It is an amenable number.

1485 is a deficient number, since it is larger than the sum of its proper divisors (1395).

1485 is a wasteful number, since it uses less digits than its factorization.

1485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25 (or 19 counting only the distinct ones).

The product of its digits is 160, while the sum is 18.

The square root of 1485 is about 38.5356977360. The cubic root of 1485 is about 11.4088573823.

The spelling of 1485 in words is "one thousand, four hundred eighty-five".

Divisors: 1 3 5 9 11 15 27 33 45 55 99 135 165 297 495 1485