2785457 has 4 divisors (see below), whose sum is σ = 2932080. Its totient is φ = 2638836.

The previous prime is 2785451. The next prime is 2785463. The reversal of 2785457 is 7545872.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (2785451) and next prime (2785463).

It is a cyclic number.

It is not a de Polignac number, because 2785457 - 2⁸ = 2785201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2785457.

It is not an unprimeable number, because it can be changed into a prime (2785451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 73283 + ... + 73320.

It is an arithmetic number, because the mean of its divisors is an integer number (733020).

2^2785457 is an apocalyptic number.

It is an amenable number.

2785457 is a deficient number, since it is larger than the sum of its proper divisors (146623).

2785457 is a wasteful number, since it uses less digits than its factorization.

2785457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146622.

The product of its digits is 78400, while the sum is 38.

The square root of 2785457 is about 1668.9688433281. The cubic root of 2785457 is about 140.7015298337.

The spelling of 2785457 in words is "two million, seven hundred eighty-five thousand, four hundred fifty-seven".