25980457 has 2 divisors, whose sum is σ = 25980458. Its totient is φ = 25980456.

The previous prime is 25980439. The next prime is 25980463. The reversal of 25980457 is 75408952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25512601 + 467856 = 5051^2 + 684^2 .

It is a cyclic number.

It is not a de Polignac number, because 25980457 - 2⁷ = 25980329 is a prime.

It is not a weakly prime, because it can be changed into another prime (25980497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12990228 + 12990229.

It is an arithmetic number, because the mean of its divisors is an integer number (12990229).

Almost surely, 2^25980457 is an apocalyptic number.

It is an amenable number.

25980457 is a deficient number, since it is larger than the sum of its proper divisors (1).

25980457 is an equidigital number, since it uses as much as digits as its factorization.

25980457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 100800, while the sum is 40.

The square root of 25980457 is about 5097.1028045351. The cubic root of 25980457 is about 296.1753625168.

The spelling of 25980457 in words is "twenty-five million, nine hundred eighty thousand, four hundred fifty-seven".