25680481 has 2 divisors, whose sum is σ = 25680482. Its totient is φ = 25680480.

The previous prime is 25680469. The next prime is 25680521. The reversal of 25680481 is 18408652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15085456 + 10595025 = 3884^2 + 3255^2 .

It is a cyclic number.

It is not a de Polignac number, because 25680481 - 2¹³ = 25672289 is a prime.

It is a super-2 number, since 2×25680481² = 1318974208782722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25680401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12840240 + 12840241.

It is an arithmetic number, because the mean of its divisors is an integer number (12840241).

Almost surely, 2^25680481 is an apocalyptic number.

It is an amenable number.

25680481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25680481 is an equidigital number, since it uses as much as digits as its factorization.

25680481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 34.

The square root of 25680481 is about 5067.5912423951. The cubic root of 25680481 is about 295.0310452820.

The spelling of 25680481 in words is "twenty-five million, six hundred eighty thousand, four hundred eighty-one".