Search a number
-
+
120161 = 1071123
BaseRepresentation
bin11101010101100001
320002211102
4131111201
512321121
62324145
71010216
oct352541
9202742
10120161
1182308
1259655
1342902
1431b0d
152590b
hex1d561

120161 has 4 divisors (see below), whose sum is σ = 121392. Its totient is φ = 118932.

The previous prime is 120157. The next prime is 120163. The reversal of 120161 is 161021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161021 = 723003.

It is a cyclic number.

It is not a de Polignac number, because 120161 - 22 = 120157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120163) 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, 455 + ... + 668.

It is an arithmetic number, because the mean of its divisors is an integer number (30348).

2120161 is an apocalyptic number.

It is an amenable number.

120161 is a deficient number, since it is larger than the sum of its proper divisors (1231).

120161 is a wasteful number, since it uses less digits than its factorization.

120161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1230.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 120161 is about 346.6424671041. The cubic root of 120161 is about 49.3462905256.

Adding to 120161 its reverse (161021), we get a palindrome (281182).

The spelling of 120161 in words is "one hundred twenty thousand, one hundred sixty-one".

Divisors: 1 107 1123 120161