120381686 has 4 divisors (see below), whose sum is σ = 180572532. Its totient is φ = 60190842.

The previous prime is 120381659. The next prime is 120381689. The reversal of 120381686 is 686183021.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120381689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30095420 + ... + 30095423.

It is an arithmetic number, because the mean of its divisors is an integer number (45143133).

Almost surely, 2^120381686 is an apocalyptic number.

120381686 is a deficient number, since it is larger than the sum of its proper divisors (60190846).

120381686 is an equidigital number, since it uses as much as digits as its factorization.

120381686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60190845.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 120381686 is about 10971.8588215489. The cubic root of 120381686 is about 493.7648161767.

The spelling of 120381686 in words is "one hundred twenty million, three hundred eighty-one thousand, six hundred eighty-six".