520120003 has 16 divisors (see below), whose sum is σ = 595476000. Its totient is φ = 450316800.

The previous prime is 520119961. The next prime is 520120009. The reversal of 520120003 is 300021025.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520120003 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (520120009) 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 15 ways as a sum of consecutive naturals, for example, 14523 + ... + 35371.

It is an arithmetic number, because the mean of its divisors is an integer number (37217250).

Almost surely, 2^520120003 is an apocalyptic number.

520120003 is a deficient number, since it is larger than the sum of its proper divisors (75355997).

520120003 is a wasteful number, since it uses less digits than its factorization.

520120003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20982.

The product of its (nonzero) digits is 60, while the sum is 13.

The square root of 520120003 is about 22806.1395900315. The cubic root of 520120003 is about 804.2070058257.

Adding to 520120003 its reverse (300021025), we get a palindrome (820141028).

The spelling of 520120003 in words is "five hundred twenty million, one hundred twenty thousand, three".