25761971 has 2 divisors, whose sum is σ = 25761972. Its totient is φ = 25761970.

The previous prime is 25761941. The next prime is 25761977. The reversal of 25761971 is 17916752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25761971 - 2⁶ = 25761907 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25761977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12880985 + 12880986.

It is an arithmetic number, because the mean of its divisors is an integer number (12880986).

Almost surely, 2^25761971 is an apocalyptic number.

25761971 is a deficient number, since it is larger than the sum of its proper divisors (1).

25761971 is an equidigital number, since it uses as much as digits as its factorization.

25761971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 38.

The square root of 25761971 is about 5075.6251831671. The cubic root of 25761971 is about 295.3427826191.

The spelling of 25761971 in words is "twenty-five million, seven hundred sixty-one thousand, nine hundred seventy-one".