25856427 has 4 divisors (see below), whose sum is σ = 34475240. Its totient is φ = 17237616.

The previous prime is 25856423. The next prime is 25856431. The reversal of 25856427 is 72465852.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (25856423) and next prime (25856431).

It is not a de Polignac number, because 25856427 - 2² = 25856423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25856423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4309402 + ... + 4309407.

It is an arithmetic number, because the mean of its divisors is an integer number (8618810).

Almost surely, 2^25856427 is an apocalyptic number.

25856427 is a deficient number, since it is larger than the sum of its proper divisors (8618813).

25856427 is an equidigital number, since it uses as much as digits as its factorization.

25856427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8618812.

The product of its digits is 134400, while the sum is 39.

The square root of 25856427 is about 5084.9215333179. The cubic root of 25856427 is about 295.7032994522.

The spelling of 25856427 in words is "twenty-five million, eight hundred fifty-six thousand, four hundred twenty-seven".