25604427 has 8 divisors (see below), whose sum is σ = 34452880. Its totient is φ = 16912800.

The previous prime is 25604399. The next prime is 25604437. The reversal of 25604427 is 72440652.

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

It is a de Polignac number, because none of the positive numbers 2^k-25604427 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25604394 and 25604403.

It is not an unprimeable number, because it can be changed into a prime (25604437) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38824 + ... + 39477.

It is an arithmetic number, because the mean of its divisors is an integer number (4306610).

Almost surely, 2^25604427 is an apocalyptic number.

25604427 is a deficient number, since it is larger than the sum of its proper divisors (8848453).

25604427 is a wasteful number, since it uses less digits than its factorization.

25604427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78413.

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 25604427 is about 5060.0817187077. The cubic root of 25604427 is about 294.7395076698.

The spelling of 25604427 in words is "twenty-five million, six hundred four thousand, four hundred twenty-seven".