120642005 has 16 divisors (see below), whose sum is σ = 158912064. Its totient is φ = 87194880.

The previous prime is 120641981. The next prime is 120642017. The reversal of 120642005 is 500246021.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-120642005 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 2237 + ... + 15693.

It is an arithmetic number, because the mean of its divisors is an integer number (9932004).

Almost surely, 2^120642005 is an apocalyptic number.

It is an amenable number.

120642005 is a deficient number, since it is larger than the sum of its proper divisors (38270059).

120642005 is a wasteful number, since it uses less digits than its factorization.

120642005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13636.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 120642005 is about 10983.7154460592. The cubic root of 120642005 is about 494.1204733301.

Adding to 120642005 its reverse (500246021), we get a palindrome (620888026).

The spelling of 120642005 in words is "one hundred twenty million, six hundred forty-two thousand, five".