120540021 has 8 divisors (see below), whose sum is σ = 183680064. Its totient is φ = 68880000.

The previous prime is 120539983. The next prime is 120540023. The reversal of 120540021 is 120045021.

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

It is not a de Polignac number, because 120540021 - 2⁷ = 120539893 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120540023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2869980 + ... + 2870021.

It is an arithmetic number, because the mean of its divisors is an integer number (22960008).

Almost surely, 2^120540021 is an apocalyptic number.

It is an amenable number.

120540021 is a deficient number, since it is larger than the sum of its proper divisors (63140043).

120540021 is an equidigital number, since it uses as much as digits as its factorization.

120540021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5740011.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 120540021 is about 10979.0719553157. The cubic root of 120540021 is about 493.9812001456.

Adding to 120540021 its reverse (120045021), we get a palindrome (240585042).

The spelling of 120540021 in words is "one hundred twenty million, five hundred forty thousand, twenty-one".