120243155 has 16 divisors (see below), whose sum is σ = 151355520. Its totient is φ = 91596672.

The previous prime is 120243113. The next prime is 120243169. The reversal of 120243155 is 551342021.

It is a cyclic number.

It is not a de Polignac number, because 120243155 - 2¹⁸ = 119981011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 120243155.

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, 1781 + ... + 15609.

It is an arithmetic number, because the mean of its divisors is an integer number (9459720).

Almost surely, 2^120243155 is an apocalyptic number.

120243155 is a deficient number, since it is larger than the sum of its proper divisors (31112365).

120243155 is a wasteful number, since it uses less digits than its factorization.

120243155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13918.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 120243155 is about 10965.5439901539. The cubic root of 120243155 is about 493.5753410970.

Adding to 120243155 its reverse (551342021), we get a palindrome (671585176).

The spelling of 120243155 in words is "one hundred twenty million, two hundred forty-three thousand, one hundred fifty-five".