120520517 has 4 divisors (see below), whose sum is σ = 129791340. Its totient is φ = 111249696.

The previous prime is 120520487. The next prime is 120520523. The reversal of 120520517 is 715025021.

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: 715025021 = 89 ⋅8033989.

It can be written as a sum of positive squares in 2 ways, for example, as 13315201 + 107205316 = 3649^2 + 10354^2 .

It is a cyclic number.

It is not a de Polignac number, because 120520517 - 2⁶ = 120520453 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 120520492 and 120520501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (120520717) 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, 4635392 + ... + 4635417.

It is an arithmetic number, because the mean of its divisors is an integer number (32447835).

Almost surely, 2^120520517 is an apocalyptic number.

It is an amenable number.

120520517 is a deficient number, since it is larger than the sum of its proper divisors (9270823).

120520517 is an equidigital number, since it uses as much as digits as its factorization.

120520517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9270822.

The product of its (nonzero) digits is 700, while the sum is 23.

The square root of 120520517 is about 10978.1836840162. The cubic root of 120520517 is about 493.9545558026.

Adding to 120520517 its reverse (715025021), we get a palindrome (835545538).

The spelling of 120520517 in words is "one hundred twenty million, five hundred twenty thousand, five hundred seventeen".