120145242 has 16 divisors (see below), whose sum is σ = 274617792. Its totient is φ = 34327200.

The previous prime is 120145241. The next prime is 120145247. The reversal of 120145242 is 242541021.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (120145241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1430259 + ... + 1430342.

It is an arithmetic number, because the mean of its divisors is an integer number (17163612).

Almost surely, 2^120145242 is an apocalyptic number.

120145242 is an abundant number, since it is smaller than the sum of its proper divisors (154472550).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

120145242 is a wasteful number, since it uses less digits than its factorization.

120145242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2860613.

The product of its (nonzero) digits is 640, while the sum is 21.

The square root of 120145242 is about 10961.0785053297. The cubic root of 120145242 is about 493.4413332863.

Adding to 120145242 its reverse (242541021), we get a palindrome (362686263).

The spelling of 120145242 in words is "one hundred twenty million, one hundred forty-five thousand, two hundred forty-two".