854868257 has 4 divisors (see below), whose sum is σ = 854927940. Its totient is φ = 854808576.

The previous prime is 854868247. The next prime is 854868277. The reversal of 854868257 is 752868458.

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: 752868458 = 2 ⋅376434229.

It can be written as a sum of positive squares in 2 ways, for example, as 252460321 + 602407936 = 15889^2 + 24544^2 .

It is a cyclic number.

It is not a de Polignac number, because 854868257 - 2¹⁸ = 854606113 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 854868199 and 854868208.

It is not an unprimeable number, because it can be changed into a prime (854868247) 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, 5969 + ... + 41777.

It is an arithmetic number, because the mean of its divisors is an integer number (213731985).

It is a Poulet number, since it divides 2^854868256-1.

Almost surely, 2^854868257 is an apocalyptic number.

854868257 is the 23873-rd pentagonal number.

It is an amenable number.

854868257 is a deficient number, since it is larger than the sum of its proper divisors (59683).

854868257 is a wasteful number, since it uses less digits than its factorization.

854868257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59682.

The product of its digits is 4300800, while the sum is 53.

The square root of 854868257 is about 29238.1301898736. The cubic root of 854868257 is about 949.0732446911.

The spelling of 854868257 in words is "eight hundred fifty-four million, eight hundred sixty-eight thousand, two hundred fifty-seven".