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BaseRepresentation
bin100111010101100011
322012000112
4213111203
520123443
63241535
71240514
oct472543
9265015
10161123
11100066
12792ab
1358451
1442a0b
1532b18
hex27563

161123 has 2 divisors, whose sum is σ = 161124. Its totient is φ = 161122.

The previous prime is 161093. The next prime is 161137. The reversal of 161123 is 321161.

Adding to 161123 its reverse (321161), we get a palindrome (482284).

It is an a-pointer prime, because the next prime (161137) can be obtained adding 161123 to its sum of digits (14).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161123 - 26 = 161059 is a prime.

It is a super-2 number, since 2×1611232 = 51921242258, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 161098 and 161107.

It is not a weakly prime, because it can be changed into another prime (161323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80561 + 80562.

It is an arithmetic number, because the mean of its divisors is an integer number (80562).

2161123 is an apocalyptic number.

161123 is a deficient number, since it is larger than the sum of its proper divisors (1).

161123 is an equidigital number, since it uses as much as digits as its factorization.

161123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36, while the sum is 14.

The square root of 161123 is about 401.4012954638. The cubic root of 161123 is about 54.4150684541.

The spelling of 161123 in words is "one hundred sixty-one thousand, one hundred twenty-three".