25705642 has 8 divisors (see below), whose sum is σ = 38789856. Its totient is φ = 12775692.

The previous prime is 25705637. The next prime is 25705643. The reversal of 25705642 is 24650752.

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

It is not an unprimeable number, because it can be changed into a prime (25705643) 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 3 ways as a sum of consecutive naturals, for example, 38148 + ... + 38815.

It is an arithmetic number, because the mean of its divisors is an integer number (4848732).

Almost surely, 2^25705642 is an apocalyptic number.

25705642 is a deficient number, since it is larger than the sum of its proper divisors (13084214).

25705642 is a wasteful number, since it uses less digits than its factorization.

25705642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77132.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 25705642 is about 5070.0731750143. The cubic root of 25705642 is about 295.1273681543.

The spelling of 25705642 in words is "twenty-five million, seven hundred five thousand, six hundred forty-two".