2505847 has 2 divisors, whose sum is σ = 2505848. Its totient is φ = 2505846.

The previous prime is 2505829. The next prime is 2505857. The reversal of 2505847 is 7485052.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2505847 - 2¹¹ = 2503799 is a prime.

It is an Ulam number.

2505847 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2505857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1252923 + 1252924.

It is an arithmetic number, because the mean of its divisors is an integer number (1252924).

2^2505847 is an apocalyptic number.

2505847 is a deficient number, since it is larger than the sum of its proper divisors (1).

2505847 is an equidigital number, since it uses as much as digits as its factorization.

2505847 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11200, while the sum is 31.

The square root of 2505847 is about 1582.9867339937. The cubic root of 2505847 is about 135.8266064475.

The spelling of 2505847 in words is "two million, five hundred five thousand, eight hundred forty-seven".