25503449 has 2 divisors, whose sum is σ = 25503450. Its totient is φ = 25503448.

The previous prime is 25503437. The next prime is 25503461. The reversal of 25503449 is 94430552.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (25503437) and next prime (25503461).

It can be written as a sum of positive squares in only one way, i.e., 23232400 + 2271049 = 4820^2 + 1507^2 .

It is a cyclic number.

It is not a de Polignac number, because 25503449 - 2²⁰ = 24454873 is a prime.

It is not a weakly prime, because it can be changed into another prime (25503479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12751724 + 12751725.

It is an arithmetic number, because the mean of its divisors is an integer number (12751725).

Almost surely, 2^25503449 is an apocalyptic number.

It is an amenable number.

25503449 is a deficient number, since it is larger than the sum of its proper divisors (1).

25503449 is an equidigital number, since it uses as much as digits as its factorization.

25503449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 25503449 is about 5050.0939595219. The cubic root of 25503449 is about 294.3515354770.

It can be divided in two parts, 25503 and 449, that added together give a palindrome (25952).

The spelling of 25503449 in words is "twenty-five million, five hundred three thousand, four hundred forty-nine".