120928771 has 4 divisors (see below), whose sum is σ = 123741112. Its totient is φ = 118116432.

The previous prime is 120928763. The next prime is 120928777. The reversal of 120928771 is 177829021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 177829021 = 2539 ⋅70039.

It is a cyclic number.

It is not a de Polignac number, because 120928771 - 2³ = 120928763 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 120928771.

It is not an unprimeable number, because it can be changed into a prime (120928777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406106 + ... + 1406191.

It is an arithmetic number, because the mean of its divisors is an integer number (30935278).

Almost surely, 2^120928771 is an apocalyptic number.

120928771 is a deficient number, since it is larger than the sum of its proper divisors (2812341).

120928771 is an equidigital number, since it uses as much as digits as its factorization.

120928771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2812340.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 120928771 is about 10996.7618415605. The cubic root of 120928771 is about 494.5116715933.

The spelling of 120928771 in words is "one hundred twenty million, nine hundred twenty-eight thousand, seven hundred seventy-one".