120142009 has 16 divisors (see below), whose sum is σ = 138015360. Its totient is φ = 103599360.

The previous prime is 120142007. The next prime is 120142021. The reversal of 120142009 is 900241021.

It is not a de Polignac number, because 120142009 - 2¹ = 120142007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120142003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28764 + ... + 32674.

It is an arithmetic number, because the mean of its divisors is an integer number (8625960).

Almost surely, 2^120142009 is an apocalyptic number.

It is an amenable number.

120142009 is a deficient number, since it is larger than the sum of its proper divisors (17873351).

120142009 is a wasteful number, since it uses less digits than its factorization.

120142009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4080.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 120142009 is about 10960.9310279739. The cubic root of 120142009 is about 493.4369072263.

It can be divided in two parts, 120 and 142009, that added together give a square (142129 = 377²).

The spelling of 120142009 in words is "one hundred twenty million, one hundred forty-two thousand, nine".