120553405 has 16 divisors (see below), whose sum is σ = 166598784. Its totient is φ = 82031040.

The previous prime is 120553403. The next prime is 120553427. The reversal of 120553405 is 504355021.

It is not a de Polignac number, because 120553405 - 2¹ = 120553403 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 120553405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120553403) 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, 8562 + ... + 17731.

It is an arithmetic number, because the mean of its divisors is an integer number (10412424).

Almost surely, 2^120553405 is an apocalyptic number.

It is an amenable number.

120553405 is a deficient number, since it is larger than the sum of its proper divisors (46045379).

120553405 is a wasteful number, since it uses less digits than its factorization.

120553405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26436.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 120553405 is about 10979.6814616818. The cubic root of 120553405 is about 493.9994823163. Note that the first 3 decimals are identical.

The spelling of 120553405 in words is "one hundred twenty million, five hundred fifty-three thousand, four hundred five".