25487543 has 4 divisors (see below), whose sum is σ = 25578528. Its totient is φ = 25396560.

The previous prime is 25487521. The next prime is 25487563. The reversal of 25487543 is 34578452.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25487543 - 2⁶ = 25487479 is a prime.

It is a super-2 number, since 2×25487543² = 1299229696353698, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 25487497 and 25487506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25487563) 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 in 3 ways as a sum of consecutive naturals, for example, 45071 + ... + 45632.

It is an arithmetic number, because the mean of its divisors is an integer number (6394632).

Almost surely, 2^25487543 is an apocalyptic number.

25487543 is a deficient number, since it is larger than the sum of its proper divisors (90985).

25487543 is an equidigital number, since it uses as much as digits as its factorization.

25487543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90984.

The product of its digits is 134400, while the sum is 38.

The square root of 25487543 is about 5048.5188917147. The cubic root of 25487543 is about 294.2903289946.

Subtracting 25487543 from its reverse (34578452), we obtain a palindrome (9090909).

The spelling of 25487543 in words is "twenty-five million, four hundred eighty-seven thousand, five hundred forty-three".