120345 has 16 divisors (see below), whose sum is σ = 196992. Its totient is φ = 62720.

The previous prime is 120331. The next prime is 120349. The reversal of 120345 is 543021.

120345 = T₁₉ + T₂₀ + ... + T₈₉.

It is not a de Polignac number, because 120345 - 2¹⁰ = 119321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (120349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1009 + ... + 1121.

It is an arithmetic number, because the mean of its divisors is an integer number (12312).

2¹²⁰³⁴⁵ is an apocalyptic number.

120345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120345 is a deficient number, since it is larger than the sum of its proper divisors (76647).

120345 is a wasteful number, since it uses less digits than its factorization.

120345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 120345 is about 346.9077687225. The cubic root of 120345 is about 49.3714653241.

Adding to 120345 its reverse (543021), we get a palindrome (663366).

It can be divided in two parts, 120 and 345, that added together give a triangular number (465 = T₃₀).

The spelling of 120345 in words is "one hundred twenty thousand, three hundred forty-five".