25006481 has 2 divisors, whose sum is σ = 25006482. Its totient is φ = 25006480.

The previous prime is 25006469. The next prime is 25006483. The reversal of 25006481 is 18460052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21242881 + 3763600 = 4609^2 + 1940^2 .

It is a cyclic number.

It is not a de Polignac number, because 25006481 - 2²² = 20812177 is a prime.

It is a super-2 number, since 2×25006481² = 1250648184006722, which contains 22 as substring.

Together with 25006483, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25006481.

It is not a weakly prime, because it can be changed into another prime (25006483) 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, 12503240 + 12503241.

It is an arithmetic number, because the mean of its divisors is an integer number (12503241).

Almost surely, 2^25006481 is an apocalyptic number.

It is an amenable number.

25006481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25006481 is an equidigital number, since it uses as much as digits as its factorization.

25006481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 25006481 is about 5000.6480580021. The cubic root of 25006481 is about 292.4270390501.

The spelling of 25006481 in words is "twenty-five million, six thousand, four hundred eighty-one".