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111138 = 2318523
BaseRepresentation
bin11011001000100010
312122110020
4123020202
512024023
62214310
7642006
oct331042
9178406
10111138
1176555
1254396
133b781
142c706
1522de3
hex1b222

111138 has 8 divisors (see below), whose sum is σ = 222288. Its totient is φ = 37044.

The previous prime is 111127. The next prime is 111143. The reversal of 111138 is 831111.

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

111138 is an admirable number.

It is a plaindrome in base 10.

It is a nialpdrome in base 11.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 9256 + ... + 9267.

It is an arithmetic number, because the mean of its divisors is an integer number (27786).

2111138 is an apocalyptic number.

111138 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

111138 is a wasteful number, since it uses less digits than its factorization.

111138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18528.

The product of its digits is 24, while the sum is 15.

The square root of 111138 is about 333.3736642268. The cubic root of 111138 is about 48.0788634130.

Adding to 111138 its reverse (831111), we get a palindrome (942249).

The spelling of 111138 in words is "one hundred eleven thousand, one hundred thirty-eight".

Divisors: 1 2 3 6 18523 37046 55569 111138