2564423 has 2 divisors, whose sum is σ = 2564424. Its totient is φ = 2564422.

The previous prime is 2564407. The next prime is 2564447. The reversal of 2564423 is 3244652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2564423 - 2⁴ = 2564407 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2564392 and 2564401.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282211 + 1282212.

It is an arithmetic number, because the mean of its divisors is an integer number (1282212).

2^2564423 is an apocalyptic number.

2564423 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564423 is an equidigital number, since it uses as much as digits as its factorization.

2564423 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 26.

The square root of 2564423 is about 1601.3815910020. The cubic root of 2564423 is about 136.8768139846.

The spelling of 2564423 in words is "two million, five hundred sixty-four thousand, four hundred twenty-three".