120342505 has 4 divisors (see below), whose sum is σ = 144411012. Its totient is φ = 96274000.

The previous prime is 120342479. The next prime is 120342539. The reversal of 120342505 is 505243021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 70963776 + 49378729 = 8424^2 + 7027^2 .

It is not a de Polignac number, because 120342505 - 2⁷ = 120342377 is a prime.

It is a super-3 number, since 3×120342505³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian 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, 12034246 + ... + 12034255.

It is an arithmetic number, because the mean of its divisors is an integer number (36102753).

Almost surely, 2^120342505 is an apocalyptic number.

It is an amenable number.

120342505 is a deficient number, since it is larger than the sum of its proper divisors (24068507).

120342505 is an equidigital number, since it uses as much as digits as its factorization.

120342505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24068506.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 120342505 is about 10970.0731538126. The cubic root of 120342505 is about 493.7112413094.

Adding to 120342505 its reverse (505243021), we get a palindrome (625585526).

The spelling of 120342505 in words is "one hundred twenty million, three hundred forty-two thousand, five hundred five".