25620481 has 2 divisors, whose sum is σ = 25620482. Its totient is φ = 25620480.

The previous prime is 25620473. The next prime is 25620487. The reversal of 25620481 is 18402652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16524225 + 9096256 = 4065^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 25620481 - 2³ = 25620473 is a prime.

It is a super-2 number, since 2×25620481² = 1312818093342722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25620487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12810240 + 12810241.

It is an arithmetic number, because the mean of its divisors is an integer number (12810241).

Almost surely, 2^25620481 is an apocalyptic number.

It is an amenable number.

25620481 is a deficient number, since it is larger than the sum of its proper divisors (1).

25620481 is an equidigital number, since it uses as much as digits as its factorization.

25620481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 25620481 is about 5061.6678081439. The cubic root of 25620481 is about 294.8010954500.

The spelling of 25620481 in words is "twenty-five million, six hundred twenty thousand, four hundred eighty-one".