2564447 has 2 divisors, whose sum is σ = 2564448. Its totient is φ = 2564446.

The previous prime is 2564423. The next prime is 2564459. The reversal of 2564447 is 7444652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2564447 - 2¹² = 2560351 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2564407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282223 + 1282224.

It is an arithmetic number, because the mean of its divisors is an integer number (1282224).

2^2564447 is an apocalyptic number.

2564447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2564447 is an equidigital number, since it uses as much as digits as its factorization.

2564447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 32.

The square root of 2564447 is about 1601.3890845138. The cubic root of 2564447 is about 136.8772409855.

The spelling of 2564447 in words is "two million, five hundred sixty-four thousand, four hundred forty-seven".