25454543 has 2 divisors, whose sum is σ = 25454544. Its totient is φ = 25454542.

The previous prime is 25454531. The next prime is 25454579. The reversal of 25454543 is 34545452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25454543 - 2¹⁸ = 25192399 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25454743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12727271 + 12727272.

It is an arithmetic number, because the mean of its divisors is an integer number (12727272).

Almost surely, 2^25454543 is an apocalyptic number.

25454543 is a deficient number, since it is larger than the sum of its proper divisors (1).

25454543 is an equidigital number, since it uses as much as digits as its factorization.

25454543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48000, while the sum is 32.

The square root of 25454543 is about 5045.2495478420. The cubic root of 25454543 is about 294.1632633240.

Adding to 25454543 its reverse (34545452), we get a palindrome (59999995).

Subtracting 25454543 from its reverse (34545452), we obtain a palindrome (9090909).

It can be divided in two parts, 2 and 5454543, that added together give a palindrome (5454545).

The spelling of 25454543 in words is "twenty-five million, four hundred fifty-four thousand, five hundred forty-three".