120261605 has 16 divisors (see below), whose sum is σ = 146893824. Its totient is φ = 94503360.

The previous prime is 120261601. The next prime is 120261613. The reversal of 120261605 is 506162021.

It is not a de Polignac number, because 120261605 - 2² = 120261601 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120261601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81020 + ... + 82490.

It is an arithmetic number, because the mean of its divisors is an integer number (9180864).

Almost surely, 2^120261605 is an apocalyptic number.

It is an amenable number.

120261605 is a deficient number, since it is larger than the sum of its proper divisors (26632219).

120261605 is a wasteful number, since it uses less digits than its factorization.

120261605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1756.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 120261605 is about 10966.3852294181. The cubic root of 120261605 is about 493.6005843893.

It can be divided in two parts, 12026 and 1605, that added together give a palindrome (13631).

The spelling of 120261605 in words is "one hundred twenty million, two hundred sixty-one thousand, six hundred five".