120155 has 8 divisors (see below), whose sum is σ = 164832. Its totient is φ = 82368.

The previous prime is 120121. The next prime is 120157. The reversal of 120155 is 551021.

120155 = T₂₀ + T₂₁ + ... + T₈₉.

120155 = 128² + 129² + ... + 134².

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

It is a cyclic number.

It is not a de Polignac number, because 120155 - 2⁶ = 120091 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1682 + ... + 1751.

It is an arithmetic number, because the mean of its divisors is an integer number (20604).

2¹²⁰¹⁵⁵ is an apocalyptic number.

120155 is a deficient number, since it is larger than the sum of its proper divisors (44677).

120155 is an equidigital number, since it uses as much as digits as its factorization.

120155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3445.

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 120155 is about 346.6338125457. The cubic root of 120155 is about 49.3454691757.

Adding to 120155 its reverse (551021), we get a palindrome (671176).

The spelling of 120155 in words is "one hundred twenty thousand, one hundred fifty-five".