25458641 has 4 divisors (see below), whose sum is σ = 27417012. Its totient is φ = 23500272.

The previous prime is 25458637. The next prime is 25458647. The reversal of 25458641 is 14685452.

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 17048641 + 8410000 = 4129^2 + 2900^2 .

It is a cyclic number.

It is not a de Polignac number, because 25458641 - 2² = 25458637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25458647) 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, 979166 + ... + 979191.

It is an arithmetic number, because the mean of its divisors is an integer number (6854253).

Almost surely, 2^25458641 is an apocalyptic number.

It is an amenable number.

25458641 is a deficient number, since it is larger than the sum of its proper divisors (1958371).

25458641 is a wasteful number, since it uses less digits than its factorization.

25458641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1958370.

The product of its digits is 38400, while the sum is 35.

The square root of 25458641 is about 5045.6556561065. The cubic root of 25458641 is about 294.1790485398.

The spelling of 25458641 in words is "twenty-five million, four hundred fifty-eight thousand, six hundred forty-one".