25511449 has 2 divisors, whose sum is σ = 25511450. Its totient is φ = 25511448.

The previous prime is 25511443. The next prime is 25511467. The reversal of 25511449 is 94411552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 20313049 + 5198400 = 4507^2 + 2280^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25511449 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25511449.

It is not a weakly prime, because it can be changed into another prime (25511443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12755724 + 12755725.

It is an arithmetic number, because the mean of its divisors is an integer number (12755725).

Almost surely, 2^25511449 is an apocalyptic number.

It is an amenable number.

25511449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25511449 is an equidigital number, since it uses as much as digits as its factorization.

25511449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 31.

The square root of 25511449 is about 5050.8859618883. The cubic root of 25511449 is about 294.3823099565.

The spelling of 25511449 in words is "twenty-five million, five hundred eleven thousand, four hundred forty-nine".