120442161 has 32 divisors (see below), whose sum is σ = 200613888. Its totient is φ = 62680320.

The previous prime is 120442111. The next prime is 120442171. The reversal of 120442161 is 161244021.

It is a happy number.

It is not a de Polignac number, because 120442161 - 2⁷ = 120442033 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (120442111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5626 + ... + 16508.

It is an arithmetic number, because the mean of its divisors is an integer number (6269184).

Almost surely, 2^120442161 is an apocalyptic number.

It is an amenable number.

120442161 is a deficient number, since it is larger than the sum of its proper divisors (80171727).

120442161 is a wasteful number, since it uses less digits than its factorization.

120442161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10941.

The product of its (nonzero) digits is 384, while the sum is 21.

The square root of 120442161 is about 10974.6143895811. The cubic root of 120442161 is about 493.8474849763.

Adding to 120442161 its reverse (161244021), we get a palindrome (281686182).

It can be divided in two parts, 1204 and 42161, that added together give a triangular number (43365 = T₂₉₄).

The spelling of 120442161 in words is "one hundred twenty million, four hundred forty-two thousand, one hundred sixty-one".