25064581 has 2 divisors, whose sum is σ = 25064582. Its totient is φ = 25064580.

The previous prime is 25064551. The next prime is 25064597. The reversal of 25064581 is 18546052.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14371681 + 10692900 = 3791^2 + 3270^2 .

It is a cyclic number.

It is not a de Polignac number, because 25064581 - 2¹¹ = 25062533 is a prime.

It is a super-2 number, since 2×25064581² = 1256466441411122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25064521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12532290 + 12532291.

It is an arithmetic number, because the mean of its divisors is an integer number (12532291).

Almost surely, 2^25064581 is an apocalyptic number.

It is an amenable number.

25064581 is a deficient number, since it is larger than the sum of its proper divisors (1).

25064581 is an equidigital number, since it uses as much as digits as its factorization.

25064581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 31.

The square root of 25064581 is about 5006.4539346727. The cubic root of 25064581 is about 292.6533386474.

The spelling of 25064581 in words is "twenty-five million, sixty-four thousand, five hundred eighty-one".