120135553 has 4 divisors (see below), whose sum is σ = 120303360. Its totient is φ = 119967748.

The previous prime is 120135551. The next prime is 120135557. The reversal of 120135553 is 355531021.

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.

It is a cyclic number.

It is not a de Polignac number, because 120135553 - 2¹ = 120135551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120135551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 82825 + ... + 84262.

It is an arithmetic number, because the mean of its divisors is an integer number (30075840).

Almost surely, 2^120135553 is an apocalyptic number.

It is an amenable number.

120135553 is a deficient number, since it is larger than the sum of its proper divisors (167807).

120135553 is an equidigital number, since it uses as much as digits as its factorization.

120135553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167806.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 120135553 is about 10960.6365234871. The cubic root of 120135553 is about 493.4280685590.

Adding to 120135553 its reverse (355531021), we get a palindrome (475666574).

The spelling of 120135553 in words is "one hundred twenty million, one hundred thirty-five thousand, five hundred fifty-three".