120042555 has 8 divisors (see below), whose sum is σ = 192068112. Its totient is φ = 64022688.

The previous prime is 120042539. The next prime is 120042557. The reversal of 120042555 is 555240021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120042555 - 2⁴ = 120042539 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120042557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4001404 + ... + 4001433.

It is an arithmetic number, because the mean of its divisors is an integer number (24008514).

Almost surely, 2^120042555 is an apocalyptic number.

120042555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120042555 is a deficient number, since it is larger than the sum of its proper divisors (72025557).

120042555 is an equidigital number, since it uses as much as digits as its factorization.

120042555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002845.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 120042555 is about 10956.3933390509. The cubic root of 120042555 is about 493.3007133391.

Adding to 120042555 its reverse (555240021), we get a palindrome (675282576).

The spelling of 120042555 in words is "one hundred twenty million, forty-two thousand, five hundred fifty-five".