25980247 has 2 divisors, whose sum is σ = 25980248. Its totient is φ = 25980246.

The previous prime is 25980223. The next prime is 25980281. The reversal of 25980247 is 74208952.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25980247 - 2¹⁵ = 25947479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25980287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12990123 + 12990124.

It is an arithmetic number, because the mean of its divisors is an integer number (12990124).

Almost surely, 2^25980247 is an apocalyptic number.

25980247 is a deficient number, since it is larger than the sum of its proper divisors (1).

25980247 is an equidigital number, since it uses as much as digits as its factorization.

25980247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 25980247 is about 5097.0822045559. The cubic root of 25980247 is about 296.1745645196.

The spelling of 25980247 in words is "twenty-five million, nine hundred eighty thousand, two hundred forty-seven".