857246605 has 4 divisors (see below), whose sum is σ = 1028695932. Its totient is φ = 685797280.

The previous prime is 857246597. The next prime is 857246647. The reversal of 857246605 is 506642758.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 476723556 + 380523049 = 21834^2 + 19507^2 .

It is not a de Polignac number, because 857246605 - 2³ = 857246597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85724656 + ... + 85724665.

It is an arithmetic number, because the mean of its divisors is an integer number (257173983).

Almost surely, 2^857246605 is an apocalyptic number.

It is an amenable number.

857246605 is a deficient number, since it is larger than the sum of its proper divisors (171449327).

857246605 is a wasteful number, since it uses less digits than its factorization.

857246605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171449326.

The product of its (nonzero) digits is 403200, while the sum is 43.

The square root of 857246605 is about 29278.7739668177. The cubic root of 857246605 is about 949.9525756566.

It can be divided in two parts, 85724 and 6605, that added together give a palindrome (92329).

The spelling of 857246605 in words is "eight hundred fifty-seven million, two hundred forty-six thousand, six hundred five".