120345517 has 2 divisors, whose sum is σ = 120345518. Its totient is φ = 120345516.

The previous prime is 120345473. The next prime is 120345523. The reversal of 120345517 is 715543021.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 116769636 + 3575881 = 10806^2 + 1891^2 .

It is a cyclic number.

It is not a de Polignac number, because 120345517 - 2²³ = 111956909 is a prime.

It is equal to p_6860242 and since 120345517 and 6860242 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120345557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60172758 + 60172759.

It is an arithmetic number, because the mean of its divisors is an integer number (60172759).

Almost surely, 2^120345517 is an apocalyptic number.

It is an amenable number.

120345517 is a deficient number, since it is larger than the sum of its proper divisors (1).

120345517 is an equidigital number, since it uses as much as digits as its factorization.

120345517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4200, while the sum is 28.

The square root of 120345517 is about 10970.2104355386. The cubic root of 120345517 is about 493.7153602361.

Adding to 120345517 its reverse (715543021), we get a palindrome (835888538).

The spelling of 120345517 in words is "one hundred twenty million, three hundred forty-five thousand, five hundred seventeen".