120553 has 4 divisors (see below), whose sum is σ = 124740. Its totient is φ = 116368.

The previous prime is 120551. The next prime is 120557. The reversal of 120553 is 355021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 355021 = 89 ⋅3989.

It can be written as a sum of positive squares in 2 ways, for example, as 59049 + 61504 = 243^2 + 248^2 .

It is a cyclic number.

It is not a de Polignac number, because 120553 - 2¹ = 120551 is a prime.

It is a Duffinian number.

It is a plaindrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2050 + ... + 2107.

It is an arithmetic number, because the mean of its divisors is an integer number (31185).

2¹²⁰⁵⁵³ is an apocalyptic number.

It is an amenable number.

120553 is a deficient number, since it is larger than the sum of its proper divisors (4187).

120553 is an equidigital number, since it uses as much as digits as its factorization.

120553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4186.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 120553 is about 347.2074307961. The cubic root of 120553 is about 49.3998929117.

Adding to 120553 its reverse (355021), we get a palindrome (475574).

The spelling of 120553 in words is "one hundred twenty thousand, five hundred fifty-three".