25628249 has 2 divisors, whose sum is σ = 25628250. Its totient is φ = 25628248.

The previous prime is 25628221. The next prime is 25628261. The reversal of 25628249 is 94282652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25603600 + 24649 = 5060^2 + 157^2 .

It is a cyclic number.

It is not a de Polignac number, because 25628249 - 2¹² = 25624153 is a prime.

It is not a weakly prime, because it can be changed into another prime (25628269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12814124 + 12814125.

It is an arithmetic number, because the mean of its divisors is an integer number (12814125).

Almost surely, 2^25628249 is an apocalyptic number.

It is an amenable number.

25628249 is a deficient number, since it is larger than the sum of its proper divisors (1).

25628249 is an equidigital number, since it uses as much as digits as its factorization.

25628249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 69120, while the sum is 38.

The square root of 25628249 is about 5062.4350860036. The cubic root of 25628249 is about 294.8308865054.

The spelling of 25628249 in words is "twenty-five million, six hundred twenty-eight thousand, two hundred forty-nine".