656025001 has 2 divisors, whose sum is σ = 656025002. Its totient is φ = 656025000.

The previous prime is 656024987. The next prime is 656025017. The reversal of 656025001 is 100520656.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 578162025 + 77862976 = 24045^2 + 8824^2 .

It is a cyclic number.

It is not a de Polignac number, because 656025001 - 2⁹ = 656024489 is a prime.

It is not a weakly prime, because it can be changed into another prime (656025061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328012500 + 328012501.

It is an arithmetic number, because the mean of its divisors is an integer number (328012501).

Almost surely, 2^656025001 is an apocalyptic number.

It is an amenable number.

656025001 is a deficient number, since it is larger than the sum of its proper divisors (1).

656025001 is an equidigital number, since it uses as much as digits as its factorization.

656025001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 656025001 is about 25612.9850076089. The cubic root of 656025001 is about 868.9073352637.

Adding to 656025001 its reverse (100520656), we get a palindrome (756545657).

The spelling of 656025001 in words is "six hundred fifty-six million, twenty-five thousand, one".