120123553 has 16 divisors (see below), whose sum is σ = 134798400. Its totient is φ = 106102080.

The previous prime is 120123533. The next prime is 120123557. The reversal of 120123553 is 355321021.

It is a cyclic number.

It is not a de Polignac number, because 120123553 - 2⁹ = 120123041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120123557) 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, 107763 + ... + 108871.

It is an arithmetic number, because the mean of its divisors is an integer number (8424900).

Almost surely, 2^120123553 is an apocalyptic number.

It is an amenable number.

120123553 is a deficient number, since it is larger than the sum of its proper divisors (14674847).

120123553 is a wasteful number, since it uses less digits than its factorization.

120123553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1392.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 120123553 is about 10960.0890963532. The cubic root of 120123553 is about 493.4116389681.

Adding to 120123553 its reverse (355321021), we get a palindrome (475444574).

The spelling of 120123553 in words is "one hundred twenty million, one hundred twenty-three thousand, five hundred fifty-three".