25742771 has 2 divisors, whose sum is σ = 25742772. Its totient is φ = 25742770.

The previous prime is 25742737. The next prime is 25742797. The reversal of 25742771 is 17724752.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25742771 is a prime.

It is not a weakly prime, because it can be changed into another prime (25742371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12871385 + 12871386.

It is an arithmetic number, because the mean of its divisors is an integer number (12871386).

Almost surely, 2^25742771 is an apocalyptic number.

25742771 is a deficient number, since it is larger than the sum of its proper divisors (1).

25742771 is an equidigital number, since it uses as much as digits as its factorization.

25742771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27440, while the sum is 35.

The square root of 25742771 is about 5073.7334380119. The cubic root of 25742771 is about 295.2693929091.

The spelling of 25742771 in words is "twenty-five million, seven hundred forty-two thousand, seven hundred seventy-one".