25605442 has 16 divisors (see below), whose sum is σ = 39900672. Its totient is φ = 12310560.

The previous prime is 25605439. The next prime is 25605449. The reversal of 25605442 is 24450652.

It is a self number, because there is not a number n which added to its sum of digits gives 25605442.

It is not an unprimeable number, because it can be changed into a prime (25605449) 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 7 ways as a sum of consecutive naturals, for example, 9118 + ... + 11590.

It is an arithmetic number, because the mean of its divisors is an integer number (2493792).

Almost surely, 2^25605442 is an apocalyptic number.

25605442 is a deficient number, since it is larger than the sum of its proper divisors (14295230).

25605442 is a wasteful number, since it uses less digits than its factorization.

25605442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2673.

The product of its (nonzero) digits is 9600, while the sum is 28.

The square root of 25605442 is about 5060.1820125367. The cubic root of 25605442 is about 294.7434022651.

The spelling of 25605442 in words is "twenty-five million, six hundred five thousand, four hundred forty-two".