25999745 has 8 divisors (see below), whose sum is σ = 31373160. Its totient is φ = 20684160.

The previous prime is 25999717. The next prime is 25999751. The reversal of 25999745 is 54799952.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 183184 + 25816561 = 428^2 + 5081^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25999745 - 2⁸ = 25999489 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25999693 and 25999702.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13460 + ... + 15269.

It is an arithmetic number, because the mean of its divisors is an integer number (3921645).

Almost surely, 2^25999745 is an apocalyptic number.

It is an amenable number.

25999745 is a deficient number, since it is larger than the sum of its proper divisors (5373415).

25999745 is a wasteful number, since it uses less digits than its factorization.

25999745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28915.

The product of its digits is 1020600, while the sum is 50.

The square root of 25999745 is about 5098.9945087242. The cubic root of 25999745 is about 296.2486383292.

The spelling of 25999745 in words is "twenty-five million, nine hundred ninety-nine thousand, seven hundred forty-five".