120685513 has 8 divisors (see below), whose sum is σ = 131430600. Its totient is φ = 110149248.

The previous prime is 120685507. The next prime is 120685517. The reversal of 120685513 is 315586021.

It can be written as a sum of positive squares in 4 ways, for example, as 13935289 + 106750224 = 3733^2 + 10332^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 120685513 - 2¹³ = 120677321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (120685517) 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 7 ways as a sum of consecutive naturals, for example, 50998 + ... + 53311.

It is an arithmetic number, because the mean of its divisors is an integer number (16428825).

Almost surely, 2^120685513 is an apocalyptic number.

120685513 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

120685513 is a deficient number, since it is larger than the sum of its proper divisors (10745087).

120685513 is a wasteful number, since it uses less digits than its factorization.

120685513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104411.

The product of its (nonzero) digits is 7200, while the sum is 31.

The square root of 120685513 is about 10985.6958359496. The cubic root of 120685513 is about 494.1798656060.

The spelling of 120685513 in words is "one hundred twenty million, six hundred eighty-five thousand, five hundred thirteen".