25481243 has 2 divisors, whose sum is σ = 25481244. Its totient is φ = 25481242.

The previous prime is 25481237. The next prime is 25481297. The reversal of 25481243 is 34218452.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25481243 - 2⁶ = 25481179 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25481233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12740621 + 12740622.

It is an arithmetic number, because the mean of its divisors is an integer number (12740622).

Almost surely, 2^25481243 is an apocalyptic number.

25481243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25481243 is an equidigital number, since it uses as much as digits as its factorization.

25481243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7680, while the sum is 29.

The square root of 25481243 is about 5047.8949077809. The cubic root of 25481243 is about 294.2660794772.

Adding to 25481243 its reverse (34218452), we get a palindrome (59699695).

The spelling of 25481243 in words is "twenty-five million, four hundred eighty-one thousand, two hundred forty-three".