120103605 has 24 divisors (see below), whose sum is σ = 208466232. Its totient is φ = 63967104.

The previous prime is 120103583. The next prime is 120103609. The reversal of 120103605 is 506301021.

It can be written as a sum of positive squares in 4 ways, for example, as 4691556 + 115412049 = 2166^2 + 10743^2 .

It is not a de Polignac number, because 120103605 - 2¹⁷ = 119972533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120103609) 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 23 ways as a sum of consecutive naturals, for example, 43527 + ... + 46203.

It is an arithmetic number, because the mean of its divisors is an integer number (8686093).

Almost surely, 2^120103605 is an apocalyptic number.

120103605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

120103605 is a deficient number, since it is larger than the sum of its proper divisors (88362627).

120103605 is a wasteful number, since it uses less digits than its factorization.

120103605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3685 (or 3682 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 120103605 is about 10959.1790294711. The cubic root of 120103605 is about 493.3843250900.

Adding to 120103605 its reverse (506301021), we get a palindrome (626404626).

The spelling of 120103605 in words is "one hundred twenty million, one hundred three thousand, six hundred five".