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145287 = 335381
BaseRepresentation
bin100011011110000111
321101022000
4203132013
514122122
63040343
71143402
oct433607
9241260
10145287
119a17a
12700b3
135118c
143ad39
152d0ac
hex23787

145287 has 8 divisors (see below), whose sum is σ = 215280. Its totient is φ = 96840.

The previous prime is 145283. The next prime is 145289. The reversal of 145287 is 782541.

It is not a de Polignac number, because 145287 - 22 = 145283 is a prime.

It is a super-2 number, since 2×1452872 = 42216624738, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 5381 = 145287 / (1 + 4 + 5 + 2 + 8 + 7).

It is a self number, because there is not a number n which added to its sum of digits gives 145287.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 145287.

It is not an unprimeable number, because it can be changed into a prime (145283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2664 + ... + 2717.

It is an arithmetic number, because the mean of its divisors is an integer number (26910).

2145287 is an apocalyptic number.

145287 is a deficient number, since it is larger than the sum of its proper divisors (69993).

145287 is an equidigital number, since it uses as much as digits as its factorization.

145287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5390 (or 5384 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 145287 is about 381.1653184643. The cubic root of 145287 is about 52.5705174841.

It can be divided in two parts, 14528 and 7, that added together give a triangular number (14535 = T170).

The spelling of 145287 in words is "one hundred forty-five thousand, two hundred eighty-seven".

Divisors: 1 3 9 27 5381 16143 48429 145287