1025640041 has 2 divisors, whose sum is σ = 1025640042. Its totient is φ = 1025640040.

The previous prime is 1025640017. The next prime is 1025640097. The reversal of 1025640041 is 1400465201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 909625600 + 116014441 = 30160^2 + 10771^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025640041 - 2⁶ = 1025639977 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1025639989 and 1025640016.

It is not a weakly prime, because it can be changed into another prime (1025640001) 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, 512820020 + 512820021.

It is an arithmetic number, because the mean of its divisors is an integer number (512820021).

Almost surely, 2^1025640041 is an apocalyptic number.

It is an amenable number.

1025640041 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025640041 is an equidigital number, since it uses as much as digits as its factorization.

1025640041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1025640041 is about 32025.6153883107. The cubic root of 1025640041 is about 1008.4746576286.

The spelling of 1025640041 in words is "one billion, twenty-five million, six hundred forty thousand, forty-one".