25741609 has 2 divisors, whose sum is σ = 25741610. Its totient is φ = 25741608.

The previous prime is 25741591. The next prime is 25741613. The reversal of 25741609 is 90614752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20115225 + 5626384 = 4485^2 + 2372^2 .

It is a cyclic number.

It is not a de Polignac number, because 25741609 - 2¹¹ = 25739561 is a prime.

It is not a weakly prime, because it can be changed into another prime (25741699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12870804 + 12870805.

It is an arithmetic number, because the mean of its divisors is an integer number (12870805).

Almost surely, 2^25741609 is an apocalyptic number.

It is an amenable number.

25741609 is a deficient number, since it is larger than the sum of its proper divisors (1).

25741609 is an equidigital number, since it uses as much as digits as its factorization.

25741609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 34.

The square root of 25741609 is about 5073.6189253826. The cubic root of 25741609 is about 295.2649501318.

The spelling of 25741609 in words is "twenty-five million, seven hundred forty-one thousand, six hundred nine".