25840297 has 6 divisors (see below), whose sum is σ = 30059178. Its totient is φ = 22148784.

The previous prime is 25840279. The next prime is 25840301. The reversal of 25840297 is 79204852.

It can be written as a sum of positive squares in only one way, i.e., 25613721 + 226576 = 5061^2 + 476^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25840297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25840207) 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 5 ways as a sum of consecutive naturals, for example, 263628 + ... + 263725.

It is an arithmetic number, because the mean of its divisors is an integer number (5009863).

Almost surely, 2^25840297 is an apocalyptic number.

It is an amenable number.

25840297 is a deficient number, since it is larger than the sum of its proper divisors (4218881).

25840297 is an equidigital number, since it uses as much as digits as its factorization.

25840297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 527367 (or 527360 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 25840297 is about 5083.3352240434. The cubic root of 25840297 is about 295.6417971883.

The spelling of 25840297 in words is "twenty-five million, eight hundred forty thousand, two hundred ninety-seven".