312120775 has 24 divisors (see below), whose sum is σ = 394394400. Its totient is φ = 244992000.

The previous prime is 312120761. The next prime is 312120779. The reversal of 312120775 is 577021213.

It is not a de Polignac number, because 312120775 - 2¹⁷ = 311989703 is a prime.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312120779) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 335511 + ... + 336439.

It is an arithmetic number, because the mean of its divisors is an integer number (16433100).

Almost surely, 2^312120775 is an apocalyptic number.

312120775 is a deficient number, since it is larger than the sum of its proper divisors (82273625).

312120775 is a wasteful number, since it uses less digits than its factorization.

312120775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1174 counting only the distinct ones).

The product of its (nonzero) digits is 2940, while the sum is 28.

The square root of 312120775 is about 17666.9401708389. The cubic root of 312120775 is about 678.3297930312.

Adding to 312120775 its reverse (577021213), we get a palindrome (889141988).

The spelling of 312120775 in words is "three hundred twelve million, one hundred twenty thousand, seven hundred seventy-five".