8457285 has 16 divisors (see below), whose sum is σ = 13696704. Its totient is φ = 4455552.

The previous prime is 8457277. The next prime is 8457287. The reversal of 8457285 is 5827548.

It is not a de Polignac number, because 8457285 - 2³ = 8457277 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 8⁵ + 4 + 5 + 7 + 2²³ + 8⁵ + 5⁵ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8457287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2152 + ... + 4641.

It is an arithmetic number, because the mean of its divisors is an integer number (856044).

Almost surely, 2^8457285 is an apocalyptic number.

It is an amenable number.

8457285 is a deficient number, since it is larger than the sum of its proper divisors (5239419).

8457285 is a wasteful number, since it uses less digits than its factorization.

8457285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6884.

The product of its digits is 89600, while the sum is 39.

The square root of 8457285 is about 2908.1411588848. The cubic root of 8457285 is about 203.7403222222.

The spelling of 8457285 in words is "eight million, four hundred fifty-seven thousand, two hundred eighty-five".