120131906 has 16 divisors (see below), whose sum is σ = 187159680. Its totient is φ = 57788880.

The previous prime is 120131897. The next prime is 120131917. The reversal of 120131906 is 609131021.

It is a happy 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, 5285 + ... + 16376.

It is an arithmetic number, because the mean of its divisors is an integer number (11697480).

Almost surely, 2^120131906 is an apocalyptic number.

120131906 is a deficient number, since it is larger than the sum of its proper divisors (67027774).

120131906 is a wasteful number, since it uses less digits than its factorization.

120131906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21769.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 120131906 is about 10960.4701541494. The cubic root of 120131906 is about 493.4230754483.

Adding to 120131906 its reverse (609131021), we get a palindrome (729262927).

The spelling of 120131906 in words is "one hundred twenty million, one hundred thirty-one thousand, nine hundred six".