25782017 has 8 divisors (see below), whose sum is σ = 26308800. Its totient is φ = 25259920.

The previous prime is 25781999. The next prime is 25782019. The reversal of 25782017 is 71028752.

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

It is a cyclic number.

It is not a de Polignac number, because 25782017 - 2⁶ = 25781953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25782019) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11234 + ... + 13332.

It is an arithmetic number, because the mean of its divisors is an integer number (3288600).

Almost surely, 2^25782017 is an apocalyptic number.

It is an amenable number.

25782017 is a deficient number, since it is larger than the sum of its proper divisors (526783).

25782017 is a wasteful number, since it uses less digits than its factorization.

25782017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2343.

The product of its (nonzero) digits is 7840, while the sum is 32.

The square root of 25782017 is about 5077.5995312746. The cubic root of 25782017 is about 295.4193671640.

The spelling of 25782017 in words is "twenty-five million, seven hundred eighty-two thousand, seventeen".