123145 has 8 divisors (see below), whose sum is σ = 161280. Its totient is φ = 89520.

The previous prime is 123143. The next prime is 123169. The reversal of 123145 is 541321.

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

It is not a de Polignac number, because 123145 - 2¹ = 123143 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123143) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 1065 + ... + 1174.

It is an arithmetic number, because the mean of its divisors is an integer number (20160).

2¹²³¹⁴⁵ is an apocalyptic number.

It is an amenable number.

123145 is a deficient number, since it is larger than the sum of its proper divisors (38135).

123145 is a wasteful number, since it uses less digits than its factorization.

123145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2255.

The product of its digits is 120, while the sum is 16.

The square root of 123145 is about 350.9202188532. The cubic root of 123145 is about 49.7514330033.

Adding to 123145 its reverse (541321), we get a palindrome (664466).

The spelling of 123145 in words is "one hundred twenty-three thousand, one hundred forty-five".