120023553 has 16 divisors (see below), whose sum is σ = 182480256. Its totient is φ = 69515520.

The previous prime is 120023549. The next prime is 120023573. The reversal of 120023553 is 355320021.

It is not a de Polignac number, because 120023553 - 2² = 120023549 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120023573) 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, 89853 + ... + 91178.

It is an arithmetic number, because the mean of its divisors is an integer number (11405016).

Almost surely, 2^120023553 is an apocalyptic number.

120023553 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

120023553 is a deficient number, since it is larger than the sum of its proper divisors (62456703).

120023553 is a wasteful number, since it uses less digits than its factorization.

120023553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181064.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 120023553 is about 10955.5261398073. The cubic root of 120023553 is about 493.2746831400.

Adding to 120023553 its reverse (355320021), we get a palindrome (475343574).

It can be divided in two parts, 1200 and 23553, that added together give a triangular number (24753 = T₂₂₂).

The spelling of 120023553 in words is "one hundred twenty million, twenty-three thousand, five hundred fifty-three".