25864577 has 2 divisors, whose sum is σ = 25864578. Its totient is φ = 25864576.

The previous prime is 25864561. The next prime is 25864609. The reversal of 25864577 is 77546852.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22193521 + 3671056 = 4711^2 + 1916^2 .

It is a cyclic number.

It is not a de Polignac number, because 25864577 - 2⁴ = 25864561 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25864507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12932288 + 12932289.

It is an arithmetic number, because the mean of its divisors is an integer number (12932289).

Almost surely, 2^25864577 is an apocalyptic number.

It is an amenable number.

25864577 is a deficient number, since it is larger than the sum of its proper divisors (1).

25864577 is an equidigital number, since it uses as much as digits as its factorization.

25864577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 470400, while the sum is 44.

The square root of 25864577 is about 5085.7228591421. The cubic root of 25864577 is about 295.7343649551.

The spelling of 25864577 in words is "twenty-five million, eight hundred sixty-four thousand, five hundred seventy-seven".