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281142 = 23215619
BaseRepresentation
bin1000100101000110110
3112021122200
41010220312
532444032
610005330
72250441
oct1045066
9467580
10281142
11182254
12116846
139ac74
1474658
155847c
hex44a36

281142 has 12 divisors (see below), whose sum is σ = 609180. Its totient is φ = 93708.

The previous prime is 281131. The next prime is 281153. The reversal of 281142 is 241182.

It is an interprime number because it is at equal distance from previous prime (281131) and next prime (281153).

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 15619 = 281142 / (2 + 8 + 1 + 1 + 4 + 2).

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 281142.

It is an unprimeable number.

281142 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7792 + ... + 7827.

It is an arithmetic number, because the mean of its divisors is an integer number (50765).

2281142 is an apocalyptic number.

281142 is an abundant number, since it is smaller than the sum of its proper divisors (328038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

281142 is a wasteful number, since it uses less digits than its factorization.

281142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15627 (or 15624 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 281142 is about 530.2282527365. The cubic root of 281142 is about 65.5101474091.

The spelling of 281142 in words is "two hundred eighty-one thousand, one hundred forty-two".

Divisors: 1 2 3 6 9 18 15619 31238 46857 93714 140571 281142