25824481 has 2 divisors, whose sum is σ = 25824482. Its totient is φ = 25824480.

The previous prime is 25824443. The next prime is 25824493. The reversal of 25824481 is 18442852.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25160256 + 664225 = 5016^2 + 815^2 .

It is a cyclic number.

It is not a de Polignac number, because 25824481 - 2⁷ = 25824353 is a prime.

It is a super-2 number, since 2×25824481² = 1333807637838722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25824431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12912240 + 12912241.

It is an arithmetic number, because the mean of its divisors is an integer number (12912241).

Almost surely, 2^25824481 is an apocalyptic number.

It is an amenable number.

25824481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25824481 is an equidigital number, since it uses as much as digits as its factorization.

25824481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20480, while the sum is 34.

The square root of 25824481 is about 5081.7793143741. The cubic root of 25824481 is about 295.5814673222.

It can be divided in two parts, 2582448 and 1, that added together give a square (2582449 = 1607²).

The spelling of 25824481 in words is "twenty-five million, eight hundred twenty-four thousand, four hundred eighty-one".