859134721 has 3 divisors (see below), whose sum is σ = 859164033. Its totient is φ = 859105410.

The previous prime is 859134707. The next prime is 859134733. The reversal of 859134721 is 127431958.

The square root of 859134721 is 29311.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 127431958 = 2 ⋅63715979.

It is a de Polignac number, because none of the positive numbers 2^k-859134721 is a prime.

It is a super-2 number, since 2×859134721² = 1476224937655495682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (859134751) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 14656 + ... + 43966.

It is an arithmetic number, because the mean of its divisors is an integer number (286388011).

Almost surely, 2^859134721 is an apocalyptic number.

859134721 is the 29311-st square number.

859134721 is the 14656-th centered octagonal number.

It is an amenable number.

859134721 is a deficient number, since it is larger than the sum of its proper divisors (29312).

859134721 is an frugal number, since it uses more digits than its factorization.

859134721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58622 (or 29311 counting only the distinct ones).

The product of its digits is 60480, while the sum is 40.

The cubic root of 859134721 is about 950.6494989683.

The spelling of 859134721 in words is "eight hundred fifty-nine million, one hundred thirty-four thousand, seven hundred twenty-one".