120343553 has 4 divisors (see below), whose sum is σ = 131283888. Its totient is φ = 109403220.

The previous prime is 120343537. The next prime is 120343571. The reversal of 120343553 is 355343021.

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: 355343021 = 11 ⋅32303911.

It is a cyclic number.

It is not a de Polignac number, because 120343553 - 2⁴ = 120343537 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120343513) 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, 5470151 + ... + 5470172.

It is an arithmetic number, because the mean of its divisors is an integer number (32820972).

Almost surely, 2^120343553 is an apocalyptic number.

It is an amenable number.

120343553 is a deficient number, since it is larger than the sum of its proper divisors (10940335).

120343553 is a wasteful number, since it uses less digits than its factorization.

120343553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10940334.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 120343553 is about 10970.1209200264. The cubic root of 120343553 is about 493.7126744630.

Adding to 120343553 its reverse (355343021), we get a palindrome (475686574).

The spelling of 120343553 in words is "one hundred twenty million, three hundred forty-three thousand, five hundred fifty-three".