120145840 has 40 divisors (see below), whose sum is σ = 288977040. Its totient is φ = 46400256.

The previous prime is 120145829. The next prime is 120145841. The reversal of 120145840 is 48541021.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (120145841) 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, 23574 + ... + 28213.

It is an arithmetic number, because the mean of its divisors is an integer number (7224426).

Almost surely, 2^120145840 is an apocalyptic number.

120145840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

120145840 is an abundant number, since it is smaller than the sum of its proper divisors (168831200).

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

120145840 is a wasteful number, since it uses less digits than its factorization.

120145840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51829 (or 51823 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 120145840 is about 10961.1057836333. The cubic root of 120145840 is about 493.4421519550.

Adding to 120145840 its reverse (48541021), we get a palindrome (168686861).

The spelling of 120145840 in words is "one hundred twenty million, one hundred forty-five thousand, eight hundred forty".