25800995 has 16 divisors (see below), whose sum is σ = 34352640. Its totient is φ = 18444000.

The previous prime is 25800991. The next prime is 25800997. The reversal of 25800995 is 59900852.

It is a happy number.

It is not a de Polignac number, because 25800995 - 2² = 25800991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25800991) 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 15 ways as a sum of consecutive naturals, for example, 731 + ... + 7220.

It is an arithmetic number, because the mean of its divisors is an integer number (2147040).

Almost surely, 2^25800995 is an apocalyptic number.

25800995 is a deficient number, since it is larger than the sum of its proper divisors (8551645).

25800995 is a wasteful number, since it uses less digits than its factorization.

25800995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8026.

The product of its (nonzero) digits is 32400, while the sum is 38.

The square root of 25800995 is about 5079.4679839527. The cubic root of 25800995 is about 295.4918349062.

The spelling of 25800995 in words is "twenty-five million, eight hundred thousand, nine hundred ninety-five".