120136655 has 4 divisors (see below), whose sum is σ = 144163992. Its totient is φ = 96109320.

The previous prime is 120136649. The next prime is 120136663. The reversal of 120136655 is 556631021.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 556631021 = 911 ⋅611011.

It is not a de Polignac number, because 120136655 - 2⁶ = 120136591 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 3 ways as a sum of consecutive naturals, for example, 12013661 + ... + 12013670.

It is an arithmetic number, because the mean of its divisors is an integer number (36040998).

Almost surely, 2^120136655 is an apocalyptic number.

120136655 is a deficient number, since it is larger than the sum of its proper divisors (24027337).

120136655 is an equidigital number, since it uses as much as digits as its factorization.

120136655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24027336.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 120136655 is about 10960.6867941749. The cubic root of 120136655 is about 493.4295772883.

Adding to 120136655 its reverse (556631021), we get a palindrome (676767676).

The spelling of 120136655 in words is "one hundred twenty million, one hundred thirty-six thousand, six hundred fifty-five".