120661306 has 4 divisors (see below), whose sum is σ = 180991962. Its totient is φ = 60330652.

The previous prime is 120661279. The next prime is 120661339. The reversal of 120661306 is 603166021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 120450625 + 210681 = 10975^2 + 459^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 30165325 + ... + 30165328.

Almost surely, 2^120661306 is an apocalyptic number.

120661306 is a deficient number, since it is larger than the sum of its proper divisors (60330656).

120661306 is an equidigital number, since it uses as much as digits as its factorization.

120661306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60330655.

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 120661306 is about 10984.5940298219. The cubic root of 120661306 is about 494.1468226676.

The spelling of 120661306 in words is "one hundred twenty million, six hundred sixty-one thousand, three hundred six".