120661387 has 8 divisors (see below), whose sum is σ = 150435072. Its totient is φ = 94021800.

The previous prime is 120661379. The next prime is 120661399. The reversal of 120661387 is 783166021.

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

It is a cyclic number.

It is not a de Polignac number, because 120661387 - 2³ = 120661379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120661487) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 783439 + ... + 783592.

It is an arithmetic number, because the mean of its divisors is an integer number (18804384).

Almost surely, 2^120661387 is an apocalyptic number.

120661387 is a deficient number, since it is larger than the sum of its proper divisors (29773685).

120661387 is a wasteful number, since it uses less digits than its factorization.

120661387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567049.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 120661387 is about 10984.5977168033. The cubic root of 120661387 is about 494.1469332412.

The spelling of 120661387 in words is "one hundred twenty million, six hundred sixty-one thousand, three hundred eighty-seven".