120131905 has 8 divisors (see below), whose sum is σ = 144614952. Its totient is φ = 95801088.

The previous prime is 120131897. The next prime is 120131917. The reversal of 120131905 is 509131021.

It can be written as a sum of positive squares in 4 ways, for example, as 5234944 + 114896961 = 2288^2 + 10719^2 .

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 120131905 - 2³ = 120131897 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36312 + ... + 39481.

It is an arithmetic number, because the mean of its divisors is an integer number (18076869).

Almost surely, 2^120131905 is an apocalyptic number.

It is an amenable number.

120131905 is a deficient number, since it is larger than the sum of its proper divisors (24483047).

120131905 is an equidigital number, since it uses as much as digits as its factorization.

120131905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76115.

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 120131905 is about 10960.4701085309. The cubic root of 120131905 is about 493.4230740791.

Adding to 120131905 its reverse (509131021), we get a palindrome (629262926).

The spelling of 120131905 in words is "one hundred twenty million, one hundred thirty-one thousand, nine hundred five".