120981009 has 8 divisors (see below), whose sum is σ = 165667840. Its totient is φ = 78474096.

The previous prime is 120980987. The next prime is 120981017. The reversal of 120981009 is 900189021.

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

It is a de Polignac number, because none of the positive numbers 2^k-120981009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120981109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 544849 + ... + 545070.

It is an arithmetic number, because the mean of its divisors is an integer number (20708480).

Almost surely, 2^120981009 is an apocalyptic number.

It is an amenable number.

120981009 is a deficient number, since it is larger than the sum of its proper divisors (44686831).

120981009 is a wasteful number, since it uses less digits than its factorization.

120981009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1089959.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 120981009 is about 10999.1367388536. The cubic root of 120981009 is about 494.5828666220.

The spelling of 120981009 in words is "one hundred twenty million, nine hundred eighty-one thousand, nine".