520653 has 8 divisors (see below), whose sum is σ = 793408. Its totient is φ = 297504.

The previous prime is 520649. The next prime is 520679. The reversal of 520653 is 356025.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520653 - 2² = 520649 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 24793 = 520653 / (5 + 2 + 0 + 6 + 5 + 3).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520633) 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 7 ways as a sum of consecutive naturals, for example, 12376 + ... + 12417.

It is an arithmetic number, because the mean of its divisors is an integer number (99176).

2⁵²⁰⁶⁵³ is an apocalyptic number.

It is an amenable number.

520653 is a deficient number, since it is larger than the sum of its proper divisors (272755).

520653 is a wasteful number, since it uses less digits than its factorization.

520653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24803.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 520653 is about 721.5628870722. The cubic root of 520653 is about 80.4481617829.

Adding to 520653 its reverse (356025), we get a palindrome (876678).

The spelling of 520653 in words is "five hundred twenty thousand, six hundred fifty-three".