25780345 has 16 divisors (see below), whose sum is σ = 31674240. Its totient is φ = 20137600.

The previous prime is 25780331. The next prime is 25780357. The reversal of 25780345 is 54308752.

It is a happy number.

It is not a de Polignac number, because 25780345 - 2¹⁹ = 25256057 is a prime.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 25780345.

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 15 ways as a sum of consecutive naturals, for example, 82740 + ... + 83050.

It is an arithmetic number, because the mean of its divisors is an integer number (1979640).

Almost surely, 2^25780345 is an apocalyptic number.

It is an amenable number.

25780345 is a deficient number, since it is larger than the sum of its proper divisors (5893895).

25780345 is a wasteful number, since it uses less digits than its factorization.

25780345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 656.

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 25780345 is about 5077.4348838759. The cubic root of 25780345 is about 295.4129809057.

The spelling of 25780345 in words is "twenty-five million, seven hundred eighty thousand, three hundred forty-five".