120442155 has 16 divisors (see below), whose sum is σ = 193121280. Its totient is φ = 64097888.

The previous prime is 120442111. The next prime is 120442171. The reversal of 120442155 is 551244021.

It is a cyclic number.

It is not a de Polignac number, because 120442155 - 2¹⁹ = 119917867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1197 + ... + 15566.

It is an arithmetic number, because the mean of its divisors is an integer number (12070080).

Almost surely, 2^120442155 is an apocalyptic number.

120442155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

120442155 is a deficient number, since it is larger than the sum of its proper divisors (72679125).

120442155 is a wasteful number, since it uses less digits than its factorization.

120442155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17250.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 120442155 is about 10974.6141162229. The cubic root of 120442155 is about 493.8474767757.

Adding to 120442155 its reverse (551244021), we get a palindrome (671686176).

The spelling of 120442155 in words is "one hundred twenty million, four hundred forty-two thousand, one hundred fifty-five".