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101243 = 137739
BaseRepresentation
bin11000101101111011
312010212202
4120231323
511214433
62100415
7601112
oct305573
9163782
10101243
116a07a
124a70b
133710c
1428c79
151eee8
hex18b7b

101243 has 4 divisors (see below), whose sum is σ = 102120. Its totient is φ = 100368.

The previous prime is 101221. The next prime is 101267. The reversal of 101243 is 342101.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 101243 - 28 = 100987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (101203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 233 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (25530).

2101243 is an apocalyptic number.

101243 is a deficient number, since it is larger than the sum of its proper divisors (877).

101243 is an equidigital number, since it uses as much as digits as its factorization.

101243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 876.

The product of its (nonzero) digits is 24, while the sum is 11.

The square root of 101243 is about 318.1870519050. The cubic root of 101243 is about 46.6074134595.

Adding to 101243 its reverse (342101), we get a palindrome (443344).

The spelling of 101243 in words is "one hundred one thousand, two hundred forty-three", and thus it is an iban number.

Divisors: 1 137 739 101243