521947 has 8 divisors (see below), whose sum is σ = 547200. Its totient is φ = 497280.

The previous prime is 521929. The next prime is 521981. The reversal of 521947 is 749125.

It is a happy number.

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 521947 - 2⁷ = 521819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3429 + ... + 3577.

It is an arithmetic number, because the mean of its divisors is an integer number (68400).

2⁵²¹⁹⁴⁷ is an apocalyptic number.

521947 is a deficient number, since it is larger than the sum of its proper divisors (25253).

521947 is a wasteful number, since it uses less digits than its factorization.

521947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293.

The product of its digits is 2520, while the sum is 28.

The square root of 521947 is about 722.4589953762. The cubic root of 521947 is about 80.5147536710.

It can be divided in two parts, 5 and 21947, that added together give a cube (21952 = 28³).

The spelling of 521947 in words is "five hundred twenty-one thousand, nine hundred forty-seven".