1025640017 has 2 divisors, whose sum is σ = 1025640018. Its totient is φ = 1025640016.

The previous prime is 1025640001. The next prime is 1025640041. The reversal of 1025640017 is 7100465201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 940280896 + 85359121 = 30664^2 + 9239^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025640017 - 2⁴ = 1025640001 is a prime.

It is not a weakly prime, because it can be changed into another prime (1025640097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512820008 + 512820009.

It is an arithmetic number, because the mean of its divisors is an integer number (512820009).

Almost surely, 2^1025640017 is an apocalyptic number.

It is an amenable number.

1025640017 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025640017 is an equidigital number, since it uses as much as digits as its factorization.

1025640017 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 26.

The square root of 1025640017 is about 32025.6150136106. The cubic root of 1025640017 is about 1008.4746497625.

The spelling of 1025640017 in words is "one billion, twenty-five million, six hundred forty thousand, seventeen".