25490249 has 2 divisors, whose sum is σ = 25490250. Its totient is φ = 25490248.

The previous prime is 25490221. The next prime is 25490251. The reversal of 25490249 is 94209452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15523600 + 9966649 = 3940^2 + 3157^2 .

It is a cyclic number.

It is not a de Polignac number, because 25490249 - 2¹⁶ = 25424713 is a prime.

Together with 25490251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25490149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12745124 + 12745125.

It is an arithmetic number, because the mean of its divisors is an integer number (12745125).

Almost surely, 2^25490249 is an apocalyptic number.

It is an amenable number.

25490249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25490249 is an equidigital number, since it uses as much as digits as its factorization.

25490249 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 25490249 is about 5048.7868839950. The cubic root of 25490249 is about 294.3007435129.

The spelling of 25490249 in words is "twenty-five million, four hundred ninety thousand, two hundred forty-nine".