521147 has 12 divisors (see below), whose sum is σ = 590520. Its totient is φ = 459360.

The previous prime is 521137. The next prime is 521153. The reversal of 521147 is 741125.

It is not a de Polignac number, because 521147 - 2¹⁰ = 520123 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7103 + ... + 7175.

It is an arithmetic number, because the mean of its divisors is an integer number (49210).

2⁵²¹¹⁴⁷ is an apocalyptic number.

521147 is a deficient number, since it is larger than the sum of its proper divisors (69373).

521147 is a wasteful number, since it uses less digits than its factorization.

521147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 143 counting only the distinct ones).

The product of its digits is 280, while the sum is 20.

The square root of 521147 is about 721.9051184193. The cubic root of 521147 is about 80.4735970405.

The spelling of 521147 in words is "five hundred twenty-one thousand, one hundred forty-seven".