2564455 has 4 divisors (see below), whose sum is σ = 3077352. Its totient is φ = 2051560.

The previous prime is 2564447. The next prime is 2564459. The reversal of 2564455 is 5544652.

2564455 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 2564455 - 2³ = 2564447 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 256441 + ... + 256450.

It is an arithmetic number, because the mean of its divisors is an integer number (769338).

2^2564455 is an apocalyptic number.

2564455 is a deficient number, since it is larger than the sum of its proper divisors (512897).

2564455 is an equidigital number, since it uses as much as digits as its factorization.

2564455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 512896.

The product of its digits is 24000, while the sum is 31.

The square root of 2564455 is about 1601.3915823433. The cubic root of 2564455 is about 136.8773833186.

The spelling of 2564455 in words is "two million, five hundred sixty-four thousand, four hundred fifty-five".