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520871 = 13103389
BaseRepresentation
bin1111111001010100111
3222110111112
41333022213
5113131441
615055235
74266401
oct1771247
9873445
10520871
1132637a
1221151b
13153110
14d7b71
15a44eb
hex7f2a7

520871 has 8 divisors (see below), whose sum is σ = 567840. Its totient is φ = 474912.

The previous prime is 520867. The next prime is 520889. The reversal of 520871 is 178025.

Added to its reverse (178025) it gives a square (698896 = 8362).

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

It is a cyclic number.

It is not a de Polignac number, because 520871 - 22 = 520867 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520841) 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, 1145 + ... + 1533.

It is an arithmetic number, because the mean of its divisors is an integer number (70980).

2520871 is an apocalyptic number.

520871 is a deficient number, since it is larger than the sum of its proper divisors (46969).

520871 is a wasteful number, since it uses less digits than its factorization.

520871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 520871 is about 721.7139322474. The cubic root of 520871 is about 80.4593882313.

Adding to 520871 its reverse (178025), we get a palindrome (698896).

The spelling of 520871 in words is "five hundred twenty thousand, eight hundred seventy-one".

Divisors: 1 13 103 389 1339 5057 40067 520871