25408543 has 2 divisors, whose sum is σ = 25408544. Its totient is φ = 25408542.

The previous prime is 25408531. The next prime is 25408547. The reversal of 25408543 is 34580452.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25408543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25408547) 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, 12704271 + 12704272.

It is an arithmetic number, because the mean of its divisors is an integer number (12704272).

Almost surely, 2^25408543 is an apocalyptic number.

25408543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25408543 is an equidigital number, since it uses as much as digits as its factorization.

25408543 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19200, while the sum is 31.

The square root of 25408543 is about 5040.6887426224. The cubic root of 25408543 is about 293.9859581120.

Adding to 25408543 its reverse (34580452), we get a palindrome (59988995).

The spelling of 25408543 in words is "twenty-five million, four hundred eight thousand, five hundred forty-three".