25780057 has 2 divisors, whose sum is σ = 25780058. Its totient is φ = 25780056.

The previous prime is 25780039. The next prime is 25780063. The reversal of 25780057 is 75008752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22886656 + 2893401 = 4784^2 + 1701^2 .

It is a cyclic number.

It is not a de Polignac number, because 25780057 - 2¹⁵ = 25747289 is a prime.

It is a super-2 number, since 2×25780057² = 1329222677846498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25780037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12890028 + 12890029.

It is an arithmetic number, because the mean of its divisors is an integer number (12890029).

Almost surely, 2^25780057 is an apocalyptic number.

It is an amenable number.

25780057 is a deficient number, since it is larger than the sum of its proper divisors (1).

25780057 is an equidigital number, since it uses as much as digits as its factorization.

25780057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19600, while the sum is 34.

The square root of 25780057 is about 5077.4065230194. The cubic root of 25780057 is about 295.4118808525.

The spelling of 25780057 in words is "twenty-five million, seven hundred eighty thousand, fifty-seven".