2805057 has 16 divisors (see below), whose sum is σ = 4337280. Its totient is φ = 1788336.

The previous prime is 2805043. The next prime is 2805071. The reversal of 2805057 is 7505082.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2805043) and next prime (2805071).

It is not a de Polignac number, because 2805057 - 2⁴ = 2805041 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an Ulam number.

2805057 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 2805057.

It is not an unprimeable number, because it can be changed into a prime (2805157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1638 + ... + 2879.

It is an arithmetic number, because the mean of its divisors is an integer number (271080).

2^2805057 is an apocalyptic number.

2805057 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2805057 is a deficient number, since it is larger than the sum of its proper divisors (1532223).

2805057 is a wasteful number, since it uses less digits than its factorization.

2805057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4549 (or 4543 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 27.

The square root of 2805057 is about 1674.8304391788. The cubic root of 2805057 is about 141.0307764417.

The spelling of 2805057 in words is "two million, eight hundred five thousand, fifty-seven".