120312305 has 4 divisors (see below), whose sum is σ = 144374772. Its totient is φ = 96249840.

The previous prime is 120312289. The next prime is 120312359. The reversal of 120312305 is 503213021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 503213021 = 23 ⋅21878827.

It can be written as a sum of positive squares in 2 ways, for example, as 58736896 + 61575409 = 7664^2 + 7847^2 .

It is not a de Polignac number, because 120312305 - 2⁴ = 120312289 is a prime.

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, 12031226 + ... + 12031235.

It is an arithmetic number, because the mean of its divisors is an integer number (36093693).

Almost surely, 2^120312305 is an apocalyptic number.

It is an amenable number.

120312305 is a deficient number, since it is larger than the sum of its proper divisors (24062467).

120312305 is an equidigital number, since it uses as much as digits as its factorization.

120312305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24062466.

The product of its (nonzero) digits is 180, while the sum is 17.

The square root of 120312305 is about 10968.6965953116. The cubic root of 120312305 is about 493.6699388428.

Adding to 120312305 its reverse (503213021), we get a palindrome (623525326).

The spelling of 120312305 in words is "one hundred twenty million, three hundred twelve thousand, three hundred five".