859527421 has 4 divisors (see below), whose sum is σ = 887254144. Its totient is φ = 831800700.

The previous prime is 859527407. The next prime is 859527443. The reversal of 859527421 is 124725958.

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 a cyclic number.

It is not a de Polignac number, because 859527421 - 2¹⁹ = 859003133 is a prime.

It is a super-2 number, since 2×859527421² = 1477574774901822482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (859527401) 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 3 ways as a sum of consecutive naturals, for example, 13863315 + ... + 13863376.

It is an arithmetic number, because the mean of its divisors is an integer number (221813536).

Almost surely, 2^859527421 is an apocalyptic number.

It is an amenable number.

859527421 is a deficient number, since it is larger than the sum of its proper divisors (27726723).

859527421 is a wasteful number, since it uses less digits than its factorization.

859527421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27726722.

The product of its digits is 201600, while the sum is 43.

The square root of 859527421 is about 29317.6980849452. The cubic root of 859527421 is about 950.7943203347.

The spelling of 859527421 in words is "eight hundred fifty-nine million, five hundred twenty-seven thousand, four hundred twenty-one".