120242155 has 8 divisors (see below), whose sum is σ = 157407984. Its totient is φ = 87448800.

The previous prime is 120242141. The next prime is 120242159. The reversal of 120242155 is 551242021.

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

It is not a de Polignac number, because 120242155 - 2¹⁵ = 120209387 is a prime.

It is a super-5 number, since 5×120242155⁵ (a number of 42 digits) contains 55555 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120242159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1093056 + ... + 1093165.

It is an arithmetic number, because the mean of its divisors is an integer number (19675998).

Almost surely, 2^120242155 is an apocalyptic number.

120242155 is a deficient number, since it is larger than the sum of its proper divisors (37165829).

120242155 is a wasteful number, since it uses less digits than its factorization.

120242155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2186237.

The product of its (nonzero) digits is 800, while the sum is 22.

The square root of 120242155 is about 10965.4983926860. The cubic root of 120242155 is about 493.5739728231.

Adding to 120242155 its reverse (551242021), we get a palindrome (671484176).

The spelling of 120242155 in words is "one hundred twenty million, two hundred forty-two thousand, one hundred fifty-five".