25810497 has 12 divisors (see below), whose sum is σ = 38289940. Its totient is φ = 16741728.

The previous prime is 25810489. The next prime is 25810501. The reversal of 25810497 is 79401852.

It can be written as a sum of positive squares in 2 ways, for example, as 24591681 + 1218816 = 4959^2 + 1104^2 .

It is not a de Polignac number, because 25810497 - 2³ = 25810489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25810297) 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 11 ways as a sum of consecutive naturals, for example, 38422 + ... + 39087.

Almost surely, 2^25810497 is an apocalyptic number.

It is an amenable number.

25810497 is a deficient number, since it is larger than the sum of its proper divisors (12479443).

25810497 is a wasteful number, since it uses less digits than its factorization.

25810497 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77552 (or 77549 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 25810497 is about 5080.4032320279. The cubic root of 25810497 is about 295.5281050682.

The spelling of 25810497 in words is "twenty-five million, eight hundred ten thousand, four hundred ninety-seven".