2865257 has 6 divisors (see below), whose sum is σ = 3024378. Its totient is φ = 2714112.

The previous prime is 2865241. The next prime is 2865259. The reversal of 2865257 is 7525682.

It can be written as a sum of positive squares in only one way, i.e., 2859481 + 5776 = 1691^2 + 76^2 .

It is not a de Polignac number, because 2865257 - 2⁴ = 2865241 is a prime.

It is a d-powerful number, because it can be written as 2¹¹ + 8 + 6³ + 5⁷ + 2¹³ + 5⁹ + 7⁷ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2865259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3608 + ... + 4329.

It is an arithmetic number, because the mean of its divisors is an integer number (504063).

2^2865257 is an apocalyptic number.

It is an amenable number.

2865257 is a deficient number, since it is larger than the sum of its proper divisors (159121).

2865257 is an equidigital number, since it uses as much as digits as its factorization.

2865257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7975 (or 7956 counting only the distinct ones).

The product of its digits is 33600, while the sum is 35.

The square root of 2865257 is about 1692.7070035892. The cubic root of 2865257 is about 142.0325423003.

The spelling of 2865257 in words is "two million, eight hundred sixty-five thousand, two hundred fifty-seven".