120720171 has 32 divisors (see below), whose sum is σ = 189826560. Its totient is φ = 67276800.

The previous prime is 120720161. The next prime is 120720181. The reversal of 120720171 is 171027021.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (120720161) and next prime (120720181).

It is not a de Polignac number, because 120720171 - 2⁵ = 120720139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (120720101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 188011 + ... + 188651.

It is an arithmetic number, because the mean of its divisors is an integer number (5932080).

Almost surely, 2^120720171 is an apocalyptic number.

120720171 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

120720171 is a deficient number, since it is larger than the sum of its proper divisors (69106389).

120720171 is a wasteful number, since it uses less digits than its factorization.

120720171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107.

The product of its (nonzero) digits is 196, while the sum is 21.

The square root of 120720171 is about 10987.2731375897. The cubic root of 120720171 is about 494.2271666341.

Adding to 120720171 its reverse (171027021), we get a palindrome (291747192).

The spelling of 120720171 in words is "one hundred twenty million, seven hundred twenty thousand, one hundred seventy-one".