521043 has 16 divisors (see below), whose sum is σ = 738720. Its totient is φ = 326144.

The previous prime is 521041. The next prime is 521047. The reversal of 521043 is 340125.

It is a cyclic number.

It is not a de Polignac number, because 521043 - 2¹ = 521041 is a prime.

It is not an unprimeable number, because it can be changed into a prime (521041) 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, 4555 + ... + 4667.

It is an arithmetic number, because the mean of its divisors is an integer number (46170).

2⁵²¹⁰⁴³ is an apocalyptic number.

521043 is a gapful number since it is divisible by the number (53) formed by its first and last digit.

521043 is a deficient number, since it is larger than the sum of its proper divisors (217677).

521043 is a wasteful number, since it uses less digits than its factorization.

521043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 521043 is about 721.8330831986. The cubic root of 521043 is about 80.4682435856.

Adding to 521043 its reverse (340125), we get a palindrome (861168).

It can be divided in two parts, 5210 and 43, that added together give a triangular number (5253 = T₁₀₂).

The spelling of 521043 in words is "five hundred twenty-one thousand, forty-three".