25426249 has 2 divisors, whose sum is σ = 25426250. Its totient is φ = 25426248.

The previous prime is 25426217. The next prime is 25426277. The reversal of 25426249 is 94262452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25401600 + 24649 = 5040^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 25426249 - 2⁵ = 25426217 is a prime.

It is not a weakly prime, because it can be changed into another prime (25426279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12713124 + 12713125.

It is an arithmetic number, because the mean of its divisors is an integer number (12713125).

Almost surely, 2^25426249 is an apocalyptic number.

It is an amenable number.

25426249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25426249 is an equidigital number, since it uses as much as digits as its factorization.

25426249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 25426249 is about 5042.4447443676. Note that the first 3 decimals coincide. The cubic root of 25426249 is about 294.0542305132.

The spelling of 25426249 in words is "twenty-five million, four hundred twenty-six thousand, two hundred forty-nine".