25261543 has 2 divisors, whose sum is σ = 25261544. Its totient is φ = 25261542.

The previous prime is 25261501. The next prime is 25261547. The reversal of 25261543 is 34516252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25261543 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25261547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12630771 + 12630772.

It is an arithmetic number, because the mean of its divisors is an integer number (12630772).

Almost surely, 2^25261543 is an apocalyptic number.

25261543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25261543 is an equidigital number, since it uses as much as digits as its factorization.

25261543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 28.

The square root of 25261543 is about 5026.0862507522. The cubic root of 25261543 is about 293.4179136548.

Adding to 25261543 its reverse (34516252), we get a palindrome (59777795).

The spelling of 25261543 in words is "twenty-five million, two hundred sixty-one thousand, five hundred forty-three".