520865457 has 8 divisors (see below), whose sum is σ = 793699776. Its totient is φ = 297637392.

The previous prime is 520865447. The next prime is 520865461. The reversal of 520865457 is 754568025.

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

It is not a de Polignac number, because 520865457 - 2¹⁰ = 520864433 is a prime.

It is not an unprimeable number, because it can be changed into a prime (520865447) 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, 12401538 + ... + 12401579.

It is an arithmetic number, because the mean of its divisors is an integer number (99212472).

Almost surely, 2^520865457 is an apocalyptic number.

It is an amenable number.

520865457 is a deficient number, since it is larger than the sum of its proper divisors (272834319).

520865457 is a wasteful number, since it uses less digits than its factorization.

520865457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24803127.

The product of its (nonzero) digits is 336000, while the sum is 42.

The square root of 520865457 is about 22822.4770128047. The cubic root of 520865457 is about 804.5910281962.

The spelling of 520865457 in words is "five hundred twenty million, eight hundred sixty-five thousand, four hundred fifty-seven".