25605601 has 16 divisors (see below), whose sum is σ = 30760704. Its totient is φ = 20839104.

The previous prime is 25605589. The next prime is 25605649. The reversal of 25605601 is 10650652.

It is not a de Polignac number, because 25605601 - 2⁹ = 25605089 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25605661) 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 15 ways as a sum of consecutive naturals, for example, 24771 + ... + 25783.

It is an arithmetic number, because the mean of its divisors is an integer number (1922544).

Almost surely, 2^25605601 is an apocalyptic number.

It is an amenable number.

25605601 is a deficient number, since it is larger than the sum of its proper divisors (5155103).

25605601 is a wasteful number, since it uses less digits than its factorization.

25605601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 25605601 is about 5060.1977234096. The cubic root of 25605601 is about 294.7440123451.

The spelling of 25605601 in words is "twenty-five million, six hundred five thousand, six hundred one".