25206541 has 4 divisors (see below), whose sum is σ = 25249084. Its totient is φ = 25164000.

The previous prime is 25206499. The next prime is 25206569. The reversal of 25206541 is 14560252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9126441 + 16080100 = 3021^2 + 4010^2 .

It is a cyclic number.

It is not a de Polignac number, because 25206541 - 2⁹ = 25206029 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 (25206341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20370 + ... + 21571.

It is an arithmetic number, because the mean of its divisors is an integer number (6312271).

Almost surely, 2^25206541 is an apocalyptic number.

It is an amenable number.

25206541 is a deficient number, since it is larger than the sum of its proper divisors (42543).

25206541 is an equidigital number, since it uses as much as digits as its factorization.

25206541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42542.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 25206541 is about 5020.6116161281. The cubic root of 25206541 is about 293.2048058078.

Adding to 25206541 its reverse (14560252), we get a palindrome (39766793).

The spelling of 25206541 in words is "twenty-five million, two hundred six thousand, five hundred forty-one".