25780503 has 16 divisors (see below), whose sum is σ = 39384576. Its totient is φ = 14694240.

The previous prime is 25780481. The next prime is 25780529. The reversal of 25780503 is 30508752.

It is a happy number.

It is not a de Polignac number, because 25780503 - 2⁶ = 25780439 is a prime.

It is a nialpdrome in base 12.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25780583) 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, 8350 + ... + 11012.

It is an arithmetic number, because the mean of its divisors is an integer number (2461536).

Almost surely, 2^25780503 is an apocalyptic number.

25780503 is a deficient number, since it is larger than the sum of its proper divisors (13604073).

25780503 is a wasteful number, since it uses less digits than its factorization.

25780503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3134.

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 25780503 is about 5077.4504428896. The cubic root of 25780503 is about 295.4135844037.

The spelling of 25780503 in words is "twenty-five million, seven hundred eighty thousand, five hundred three".