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BaseRepresentation
bin11111011111011
3211010011
43323323
51003443
6202351
765002
oct37373
924104
1016123
1111128
1293b7
137453
145c39
154b9d
hex3efb

16123 has 4 divisors (see below), whose sum is σ = 16848. Its totient is φ = 15400.

The previous prime is 16111. The next prime is 16127. The reversal of 16123 is 32161.

16123 is nontrivially palindromic in base 8.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32161 = 291109.

It is a cyclic number.

It is not a de Polignac number, because 16123 - 25 = 16091 is a prime.

It is a super-2 number, since 2×161232 = 519902258, which contains 22 as substring.

It is a Smith number, since the sum of its digits (13) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an Ulam number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

16123 is an undulating number in base 8.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (16127) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 328 + ... + 373.

It is an arithmetic number, because the mean of its divisors is an integer number (4212).

216123 is an apocalyptic number.

16123 is a deficient number, since it is larger than the sum of its proper divisors (725).

16123 is an equidigital number, since it uses as much as digits as its factorization.

16123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its digits is 36, while the sum is 13.

The square root of 16123 is about 126.9763757555. The cubic root of 16123 is about 25.2628271917.

Subtracting from 16123 its sum of digits (13), we obtain a triangular number (16110 = T179).

Adding to 16123 its reverse (32161), we get a palindrome (48284).

The spelling of 16123 in words is "sixteen thousand, one hundred twenty-three".

Divisors: 1 23 701 16123