2805457 has 2 divisors, whose sum is σ = 2805458. Its totient is φ = 2805456.

The previous prime is 2805443. The next prime is 2805461. The reversal of 2805457 is 7545082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1560001 + 1245456 = 1249^2 + 1116^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2805457 is a prime.

It is not a weakly prime, because it can be changed into another prime (2805487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402728 + 1402729.

It is an arithmetic number, because the mean of its divisors is an integer number (1402729).

2^2805457 is an apocalyptic number.

It is an amenable number.

2805457 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805457 is an equidigital number, since it uses as much as digits as its factorization.

2805457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 2805457 is about 1674.9498499955. The cubic root of 2805457 is about 141.0374797670.

The spelling of 2805457 in words is "two million, eight hundred five thousand, four hundred fifty-seven".