25604643 has 8 divisors (see below), whose sum is σ = 34718400. Its totient is φ = 16780328.

The previous prime is 25604641. The next prime is 25604687. The reversal of 25604643 is 34640652.

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

It is a cyclic number.

It is not a de Polignac number, because 25604643 - 2¹ = 25604641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25604643.

It is not an unprimeable number, because it can be changed into a prime (25604641) 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, 72153 + ... + 72506.

It is an arithmetic number, because the mean of its divisors is an integer number (4339800).

Almost surely, 2^25604643 is an apocalyptic number.

25604643 is a deficient number, since it is larger than the sum of its proper divisors (9113757).

25604643 is a wasteful number, since it uses less digits than its factorization.

25604643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144721.

The product of its (nonzero) digits is 17280, while the sum is 30.

The square root of 25604643 is about 5060.1030621915. The cubic root of 25604643 is about 294.7403364790.

The spelling of 25604643 in words is "twenty-five million, six hundred four thousand, six hundred forty-three".