25682497 has 4 divisors (see below), whose sum is σ = 25696980. Its totient is φ = 25668016.

The previous prime is 25682491. The next prime is 25682519. The reversal of 25682497 is 79428652.

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 5755201 + 19927296 = 2399^2 + 4464^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25682497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25682491) 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, 4138 + ... + 8275.

It is an arithmetic number, because the mean of its divisors is an integer number (6424245).

Almost surely, 2^25682497 is an apocalyptic number.

25682497 is the 4138-th pentagonal number.

It is an amenable number.

25682497 is a deficient number, since it is larger than the sum of its proper divisors (14483).

25682497 is a wasteful number, since it uses less digits than its factorization.

25682497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14482.

The product of its digits is 241920, while the sum is 43.

The square root of 25682497 is about 5067.7901495622. The cubic root of 25682497 is about 295.0387653740.

The spelling of 25682497 in words is "twenty-five million, six hundred eighty-two thousand, four hundred ninety-seven".