25804543 has 2 divisors, whose sum is σ = 25804544. Its totient is φ = 25804542.

The previous prime is 25804433. The next prime is 25804547. The reversal of 25804543 is 34540852.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25804543 is a prime.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25804547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12902271 + 12902272.

It is an arithmetic number, because the mean of its divisors is an integer number (12902272).

Almost surely, 2^25804543 is an apocalyptic number.

25804543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25804543 is an equidigital number, since it uses as much as digits as its factorization.

25804543 is an evil number, because the sum of its binary digits is even.

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

The square root of 25804543 is about 5079.8172211212. The cubic root of 25804543 is about 295.5053790476.

The spelling of 25804543 in words is "twenty-five million, eight hundred four thousand, five hundred forty-three".