25424543 has 4 divisors (see below), whose sum is σ = 25526088. Its totient is φ = 25323000.

The previous prime is 25424533. The next prime is 25424593. The reversal of 25424543 is 34542452.

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 25424543 - 2¹⁶ = 25359007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25424533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50396 + ... + 50897.

It is an arithmetic number, because the mean of its divisors is an integer number (6381522).

Almost surely, 2^25424543 is an apocalyptic number.

25424543 is a deficient number, since it is larger than the sum of its proper divisors (101545).

25424543 is a wasteful number, since it uses less digits than its factorization.

25424543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101544.

The product of its digits is 19200, while the sum is 29.

The square root of 25424543 is about 5042.2755775542. The cubic root of 25424543 is about 294.0476537437.

Adding to 25424543 its reverse (34542452), we get a palindrome (59966995).

The spelling of 25424543 in words is "twenty-five million, four hundred twenty-four thousand, five hundred forty-three".