25306243 has 2 divisors, whose sum is σ = 25306244. Its totient is φ = 25306242.

The previous prime is 25306223. The next prime is 25306247. The reversal of 25306243 is 34260352.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25306243 - 2¹³ = 25298051 is a prime.

It is not a weakly prime, because it can be changed into another prime (25306247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12653121 + 12653122.

It is an arithmetic number, because the mean of its divisors is an integer number (12653122).

Almost surely, 2^25306243 is an apocalyptic number.

25306243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25306243 is an equidigital number, since it uses as much as digits as its factorization.

25306243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 25306243 is about 5030.5310852831. The cubic root of 25306243 is about 293.5908781786.

Adding to 25306243 its reverse (34260352), we get a palindrome (59566595).

The spelling of 25306243 in words is "twenty-five million, three hundred six thousand, two hundred forty-three".