120145 has 4 divisors (see below), whose sum is σ = 144180. Its totient is φ = 96112.

The previous prime is 120121. The next prime is 120157. The reversal of 120145 is 541021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541021 = 13 ⋅41617.

It can be written as a sum of positive squares in 2 ways, for example, as 94864 + 25281 = 308^2 + 159^2 .

It is a cyclic number.

It is not a de Polignac number, because 120145 - 2⁷ = 120017 is a prime.

120145 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12010 + ... + 12019.

It is an arithmetic number, because the mean of its divisors is an integer number (36045).

2¹²⁰¹⁴⁵ is an apocalyptic number.

It is an amenable number.

120145 is a deficient number, since it is larger than the sum of its proper divisors (24035).

120145 is an equidigital number, since it uses as much as digits as its factorization.

120145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24034.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 120145 is about 346.6193878017. The cubic root of 120145 is about 49.3441001985.

Adding to 120145 its reverse (541021), we get a palindrome (661166).

It can be divided in two parts, 1201 and 45, that multiplied together give a palindrome (54045).

The spelling of 120145 in words is "one hundred twenty thousand, one hundred forty-five".