120819605 has 4 divisors (see below), whose sum is σ = 144983532. Its totient is φ = 96655680.

The previous prime is 120819583. The next prime is 120819619. The reversal of 120819605 is 506918021.

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 28793956 + 92025649 = 5366^2 + 9593^2 .

It is not a de Polignac number, because 120819605 - 2¹⁶ = 120754069 is a prime.

It is a Duffinian number.

It is a congruent 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, 12081956 + ... + 12081965.

It is an arithmetic number, because the mean of its divisors is an integer number (36245883).

Almost surely, 2^120819605 is an apocalyptic number.

It is an amenable number.

120819605 is a deficient number, since it is larger than the sum of its proper divisors (24163927).

120819605 is an equidigital number, since it uses as much as digits as its factorization.

120819605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24163926.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 120819605 is about 10991.7971687982. The cubic root of 120819605 is about 494.3628233275.

The spelling of 120819605 in words is "one hundred twenty million, eight hundred nineteen thousand, six hundred five".