25521441 has 24 divisors (see below), whose sum is σ = 37716672. Its totient is φ = 15338400.

The previous prime is 25521413. The next prime is 25521469. The reversal of 25521441 is 14412552.

It is an interprime number because it is at equal distance from previous prime (25521413) and next prime (25521469).

It is not a de Polignac number, because 25521441 - 2⁵ = 25521409 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25521491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 60411 + ... + 60831.

It is an arithmetic number, because the mean of its divisors is an integer number (1571528).

Almost surely, 2^25521441 is an apocalyptic number.

It is an amenable number.

25521441 is a deficient number, since it is larger than the sum of its proper divisors (12195231).

25521441 is a wasteful number, since it uses less digits than its factorization.

25521441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 602 counting only the distinct ones).

The product of its digits is 1600, while the sum is 24.

The square root of 25521441 is about 5051.8749984535. The cubic root of 25521441 is about 294.4207382467.

Adding to 25521441 its reverse (14412552), we get a palindrome (39933993).

Subtracting from 25521441 its reverse (14412552), we obtain a square (11108889 = 3333²).

It can be divided in two parts, 255214 and 41, that added together give a triangular number (255255 = T₇₁₄).

The spelling of 25521441 in words is "twenty-five million, five hundred twenty-one thousand, four hundred forty-one".