25642017 has 12 divisors (see below), whose sum is σ = 37098880. Its totient is φ = 17066808.

The previous prime is 25642013. The next prime is 25642051. The reversal of 25642017 is 71024652.

25642017 is a `hidden beast` number, since 2 + 5 + 642 + 0 + 17 = 666.

It is not a de Polignac number, because 25642017 - 2² = 25642013 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is not an unprimeable number, because it can be changed into a prime (25642013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4584 + ... + 8502.

Almost surely, 2^25642017 is an apocalyptic number.

It is an amenable number.

25642017 is a deficient number, since it is larger than the sum of its proper divisors (11456863).

25642017 is a wasteful number, since it uses less digits than its factorization.

25642017 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4652 (or 4649 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 25642017 is about 5063.7947233276. The cubic root of 25642017 is about 294.8836733730.

Adding to 25642017 its reverse (71024652), we get a palindrome (96666669).

The spelling of 25642017 in words is "twenty-five million, six hundred forty-two thousand, seventeen".