521973 has 12 divisors (see below), whose sum is σ = 767520. Its totient is φ = 341736.

The previous prime is 521929. The next prime is 521981. The reversal of 521973 is 379125.

It is not a de Polignac number, because 521973 - 2¹² = 517877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521903) 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, 40 + ... + 1022.

It is an arithmetic number, because the mean of its divisors is an integer number (63960).

2⁵²¹⁹⁷³ is an apocalyptic number.

It is an amenable number.

521973 is a deficient number, since it is larger than the sum of its proper divisors (245547).

521973 is a wasteful number, since it uses less digits than its factorization.

521973 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1048 (or 1045 counting only the distinct ones).

The product of its digits is 1890, while the sum is 27.

The square root of 521973 is about 722.4769892529. The cubic root of 521973 is about 80.5160905557.

It can be divided in two parts, 52 and 1973, that added together give a square (2025 = 45²).

The spelling of 521973 in words is "five hundred twenty-one thousand, nine hundred seventy-three".