25665047 has 2 divisors, whose sum is σ = 25665048. Its totient is φ = 25665046.

The previous prime is 25665043. The next prime is 25665071. The reversal of 25665047 is 74056652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25665047 - 2² = 25665043 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25664998 and 25665016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25665041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12832523 + 12832524.

It is an arithmetic number, because the mean of its divisors is an integer number (12832524).

Almost surely, 2^25665047 is an apocalyptic number.

25665047 is a deficient number, since it is larger than the sum of its proper divisors (1).

25665047 is an equidigital number, since it uses as much as digits as its factorization.

25665047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 25665047 is about 5066.0681993041. The cubic root of 25665047 is about 294.9719287662.

The spelling of 25665047 in words is "twenty-five million, six hundred sixty-five thousand, forty-seven".