854536521 has 4 divisors (see below), whose sum is σ = 1139382032. Its totient is φ = 569691012.

The previous prime is 854536519. The next prime is 854536523. The reversal of 854536521 is 125635458.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (854536519) and next prime (854536523).

It is not a de Polignac number, because 854536521 - 2¹ = 854536519 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 854536521.

It is not an unprimeable number, because it can be changed into a prime (854536523) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142422751 + ... + 142422756.

It is an arithmetic number, because the mean of its divisors is an integer number (284845508).

Almost surely, 2^854536521 is an apocalyptic number.

It is an amenable number.

854536521 is a deficient number, since it is larger than the sum of its proper divisors (284845511).

854536521 is a wasteful number, since it uses less digits than its factorization.

854536521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284845510.

The product of its digits is 144000, while the sum is 39.

The square root of 854536521 is about 29232.4566364170. The cubic root of 854536521 is about 948.9504645654.

The spelling of 854536521 in words is "eight hundred fifty-four million, five hundred thirty-six thousand, five hundred twenty-one".