521084857 has 8 divisors (see below), whose sum is σ = 525853152. Its totient is φ = 516328800.

The previous prime is 521084831. The next prime is 521084887. The reversal of 521084857 is 758480125.

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 521084857 - 2¹⁵ = 521052089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (521084827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97078 + ... + 102304.

It is an arithmetic number, because the mean of its divisors is an integer number (65731644).

Almost surely, 2^521084857 is an apocalyptic number.

It is an amenable number.

521084857 is a deficient number, since it is larger than the sum of its proper divisors (4768295).

521084857 is a wasteful number, since it uses less digits than its factorization.

521084857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6119.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 521084857 is about 22827.2831716786. The cubic root of 521084857 is about 804.7039828241.

It can be divided in two parts, 52108 and 4857, that added together give a palindrome (56965).

The spelling of 521084857 in words is "five hundred twenty-one million, eighty-four thousand, eight hundred fifty-seven".