2557447 has 2 divisors, whose sum is σ = 2557448. Its totient is φ = 2557446.

The previous prime is 2557441. The next prime is 2557453. The reversal of 2557447 is 7447552.

It is a balanced prime because it is at equal distance from previous prime (2557441) and next prime (2557453).

It is a cyclic number.

It is not a de Polignac number, because 2557447 - 2¹⁵ = 2524679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2557441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1278723 + 1278724.

It is an arithmetic number, because the mean of its divisors is an integer number (1278724).

2^2557447 is an apocalyptic number.

2557447 is a deficient number, since it is larger than the sum of its proper divisors (1).

2557447 is an equidigital number, since it uses as much as digits as its factorization.

2557447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39200, while the sum is 34.

The square root of 2557447 is about 1599.2019884930. The cubic root of 2557447 is about 136.7525859361.

The spelling of 2557447 in words is "two million, five hundred fifty-seven thousand, four hundred forty-seven".