25243243 has 2 divisors, whose sum is σ = 25243244. Its totient is φ = 25243242.

The previous prime is 25243241. The next prime is 25243261. The reversal of 25243243 is 34234252.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25243243 - 2¹ = 25243241 is a prime.

Together with 25243241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25243241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12621621 + 12621622.

It is an arithmetic number, because the mean of its divisors is an integer number (12621622).

Almost surely, 2^25243243 is an apocalyptic number.

25243243 is a deficient number, since it is larger than the sum of its proper divisors (1).

25243243 is an equidigital number, since it uses as much as digits as its factorization.

25243243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 25.

The square root of 25243243 is about 5024.2654189443. The cubic root of 25243243 is about 293.3470438093.

Adding to 25243243 its reverse (34234252), we get a palindrome (59477495).

The spelling of 25243243 in words is "twenty-five million, two hundred forty-three thousand, two hundred forty-three".