120515161 has 4 divisors (see below), whose sum is σ = 129785572. Its totient is φ = 111244752.

The previous prime is 120515149. The next prime is 120515173. The reversal of 120515161 is 161515021.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161515021 = 103 ⋅1568107.

It is an interprime number because it is at equal distance from previous prime (120515149) and next prime (120515173).

It can be written as a sum of positive squares in 2 ways, for example, as 57471561 + 63043600 = 7581^2 + 7940^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-120515161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120515141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4635186 + ... + 4635211.

It is an arithmetic number, because the mean of its divisors is an integer number (32446393).

Almost surely, 2^120515161 is an apocalyptic number.

It is an amenable number.

120515161 is a deficient number, since it is larger than the sum of its proper divisors (9270411).

120515161 is an equidigital number, since it uses as much as digits as its factorization.

120515161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270410.

The product of its (nonzero) digits is 300, while the sum is 22.

The square root of 120515161 is about 10977.9397429572. The cubic root of 120515161 is about 493.9472384875.

The spelling of 120515161 in words is "one hundred twenty million, five hundred fifteen thousand, one hundred sixty-one".