25780535 has 8 divisors (see below), whose sum is σ = 33749136. Its totient is φ = 18749440.

The previous prime is 25780529. The next prime is 25780567. The reversal of 25780535 is 53508752.

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

It is not a de Polignac number, because 25780535 - 2¹⁰ = 25779511 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25780495 and 25780504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 234314 + ... + 234423.

It is an arithmetic number, because the mean of its divisors is an integer number (4218642).

Almost surely, 2^25780535 is an apocalyptic number.

25780535 is a deficient number, since it is larger than the sum of its proper divisors (7968601).

25780535 is a wasteful number, since it uses less digits than its factorization.

25780535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 468753.

The product of its (nonzero) digits is 42000, while the sum is 35.

The square root of 25780535 is about 5077.4535940765. The cubic root of 25780535 is about 295.4137066308.

The spelling of 25780535 in words is "twenty-five million, seven hundred eighty thousand, five hundred thirty-five".