25445249 has 2 divisors, whose sum is σ = 25445250. Its totient is φ = 25445248.

The previous prime is 25445221. The next prime is 25445257. The reversal of 25445249 is 94254452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20539024 + 4906225 = 4532^2 + 2215^2 .

It is a cyclic number.

It is not a de Polignac number, because 25445249 - 2¹² = 25441153 is a prime.

It is a Chen prime.

It is equal to p_1591937 and since 25445249 and 1591937 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (25445219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12722624 + 12722625.

It is an arithmetic number, because the mean of its divisors is an integer number (12722625).

Almost surely, 2^25445249 is an apocalyptic number.

It is an amenable number.

25445249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25445249 is an equidigital number, since it uses as much as digits as its factorization.

25445249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 57600, while the sum is 35.

The square root of 25445249 is about 5044.3283993015. The cubic root of 25445249 is about 294.1274571920.

The spelling of 25445249 in words is "twenty-five million, four hundred forty-five thousand, two hundred forty-nine".