120510553 has 4 divisors (see below), whose sum is σ = 123313168. Its totient is φ = 117707940.

The previous prime is 120510529. The next prime is 120510557. The reversal of 120510553 is 355015021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 355015021 = 263 ⋅1349867.

It is a cyclic number.

It is not a de Polignac number, because 120510553 - 2¹⁷ = 120379481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120510557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1401243 + ... + 1401328.

It is an arithmetic number, because the mean of its divisors is an integer number (30828292).

Almost surely, 2^120510553 is an apocalyptic number.

It is an amenable number.

120510553 is a deficient number, since it is larger than the sum of its proper divisors (2802615).

120510553 is an equidigital number, since it uses as much as digits as its factorization.

120510553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2802614.

The product of its (nonzero) digits is 750, while the sum is 22.

The square root of 120510553 is about 10977.7298655050. The cubic root of 120510553 is about 493.9409429092.

Adding to 120510553 its reverse (355015021), we get a palindrome (475525574).

The spelling of 120510553 in words is "one hundred twenty million, five hundred ten thousand, five hundred fifty-three".