25778245 has 16 divisors (see below), whose sum is σ = 32256000. Its totient is φ = 19752768.

The previous prime is 25778219. The next prime is 25778257. The reversal of 25778245 is 54287752.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 25778245 - 2¹¹ = 25776197 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 25778198 and 25778207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19516 + ... + 20794.

It is an arithmetic number, because the mean of its divisors is an integer number (2016000).

Almost surely, 2^25778245 is an apocalyptic number.

It is an amenable number.

25778245 is a deficient number, since it is larger than the sum of its proper divisors (6477755).

25778245 is a wasteful number, since it uses less digits than its factorization.

25778245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452.

The product of its digits is 156800, while the sum is 40.

The square root of 25778245 is about 5077.2280823300. The cubic root of 25778245 is about 295.4049594963.

The spelling of 25778245 in words is "twenty-five million, seven hundred seventy-eight thousand, two hundred forty-five".