521049 has 4 divisors (see below), whose sum is σ = 694736. Its totient is φ = 347364.

The previous prime is 521047. The next prime is 521051. The reversal of 521049 is 940125.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (521047) and next prime (521051).

It is not a de Polignac number, because 521049 - 2¹ = 521047 is a prime.

It is a D-number.

It is a Duffinian number.

It is a Curzon number.

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 3 ways as a sum of consecutive naturals, for example, 86839 + ... + 86844.

It is an arithmetic number, because the mean of its divisors is an integer number (173684).

2⁵²¹⁰⁴⁹ is an apocalyptic number.

It is an amenable number.

521049 is a deficient number, since it is larger than the sum of its proper divisors (173687).

521049 is a wasteful number, since it uses less digits than its factorization.

521049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173686.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 521049 is about 721.8372392721. The cubic root of 521049 is about 80.4685524581.

The spelling of 521049 in words is "five hundred twenty-one thousand, forty-nine".