25917642 has 24 divisors (see below), whose sum is σ = 58597344. Its totient is φ = 8263464.

The previous prime is 25917641. The next prime is 25917667. The reversal of 25917642 is 24671952.

25917642 is a `hidden beast` number, since 2 + 5 + 9 + 1 + 7 + 642 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 25917597 and 25917606.

It is not an unprimeable number, because it can be changed into a prime (25917641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30888 + ... + 31715.

It is an arithmetic number, because the mean of its divisors is an integer number (2441556).

Almost surely, 2^25917642 is an apocalyptic number.

25917642 is an abundant number, since it is smaller than the sum of its proper divisors (32679702).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25917642 is a wasteful number, since it uses less digits than its factorization.

25917642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62634 (or 62631 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 25917642 is about 5090.9372418053. The cubic root of 25917642 is about 295.9364743758.

The spelling of 25917642 in words is "twenty-five million, nine hundred seventeen thousand, six hundred forty-two".