2865545 has 4 divisors (see below), whose sum is σ = 3438660. Its totient is φ = 2292432.

The previous prime is 2865529. The next prime is 2865557. The reversal of 2865545 is 5455682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5455682 = 2 ⋅2727841.

It can be written as a sum of positive squares in 2 ways, for example, as 1951609 + 913936 = 1397^2 + 956^2 .

It is a cyclic number.

It is not a de Polignac number, because 2865545 - 2⁴ = 2865529 is a prime.

It is a super-2 number, since 2×2865545² = 16422696294050, which contains 22 as substring.

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, 286550 + ... + 286559.

It is an arithmetic number, because the mean of its divisors is an integer number (859665).

2^2865545 is an apocalyptic number.

It is an amenable number.

2865545 is a deficient number, since it is larger than the sum of its proper divisors (573115).

2865545 is an equidigital number, since it uses as much as digits as its factorization.

2865545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573114.

The product of its digits is 48000, while the sum is 35.

The square root of 2865545 is about 1692.7920722877. The cubic root of 2865545 is about 142.0373009196.

The spelling of 2865545 in words is "two million, eight hundred sixty-five thousand, five hundred forty-five".