120981517 has 2 divisors, whose sum is σ = 120981518. Its totient is φ = 120981516.

The previous prime is 120981491. The next prime is 120981521. The reversal of 120981517 is 715189021.

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., 99720196 + 21261321 = 9986^2 + 4611^2 .

It is a cyclic number.

It is not a de Polignac number, because 120981517 - 2¹⁵ = 120948749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (120981557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 60490758 + 60490759.

It is an arithmetic number, because the mean of its divisors is an integer number (60490759).

Almost surely, 2^120981517 is an apocalyptic number.

It is an amenable number.

120981517 is a deficient number, since it is larger than the sum of its proper divisors (1).

120981517 is an equidigital number, since it uses as much as digits as its factorization.

120981517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 120981517 is about 10999.1598315508. The cubic root of 120981517 is about 494.5835588732.

The spelling of 120981517 in words is "one hundred twenty million, nine hundred eighty-one thousand, five hundred seventeen".